24/7 LIVE STAFF — Compassionate help, any time day or night
CALL NOW 1-888-ATTY-911
Blog | City of Celina

City of Celina Trampoline Park Injury Attorneys Attorney911 of Houston TX Ralph Manginello 25 Years Defeating Sky Zone and Urban Air Waivers with Former Recreational Defense Attorney Lupe Peña Cosmic Jump 11.485M Harris County Verdict and Damion Collins 15.6M Urban Air Arbitration Power for Pediatric TBI Spinal Cord SCIWORA Salter-Harris and Rhabdomyolysis Claims ASTM F2970 and EN ISO 23659 2022 Standards Mastery Holding Unleashed Brands Seidler Equity Palladium and Sky Zone Inc Accountable for DEFY Altitude Launch and Backyard Jumpking Skywalker Defects Using Texas Family Code 153.073 and Delfingen Bilingual Tactics to Prevail for North Texas Families No Fee Unless We Win 1-888-ATTY-911

April 25, 2026 22 min read
city-of-celina-featured-image.png

“His feet hit the mat, and almost instantly his knees buckled down, and he just let out the worst scream that you could ever have heard from a child.” That is how Kaitlin “Kati” Hill described the moment her three-year-old son Colton’s life changed at a trampoline park. Colton suffered a broken femur, spent months in a body cast, and became a symbol for thousands of parents across Texas who, like Kati, later said those heartbreaking five words: “We had no idea.”

In the City of Celina, where family life centers on youth sports and weekend activities, parents often trust that the local “adventure park” or “jump center” is a sanctioned, regulated safe haven. We are here to tell you that it is not. A trampoline injury in the City of Celina is never just an accident; it is the predictable output of a business model that puts margin ahead of your child’s safety.

At Attorney911, led by Ralph Manginello with over 25 years of trial experience, we have learned that these facilities operate in a regulatory vacuum. Texas has no statewide trampoline park safety act. There is no state agency in Austin that inspects the trampoline decks at the Urban Air in McKinney or the Sky Zone in Frisco that families from the City of Celina frequent. If your child comes off a court on a stretcher, the park’s first move won’t be an apology—it will be pointing at the kiosk waiver you signed while your kids were tugging on your arm to get inside.

Think that waiver means you can’t sue? Think again. In Harris County, a jury awarded $11.485 million to a teenager named Max Menchaca after he fell through a torn trampoline mat onto concrete at Cosmic Jump. The waiver was signed. The jury found gross negligence anyway. We know how to dismantle these waivers because our team includes a former insurance defense attorney, Lupe Peña, who used to write and defend the very documents the parks now use as shields. He knows exactly where the holes are.

If your child was injured in the City of Celina city limits or at a regional park serving Collin County, the clock is not just ticking on the two-year Texas statute of limitations. It is ticking on the evidence. Most park surveillance systems overwrite in as little as 7 to 30 days. We send spoliation letters within 24 hours of retention to freeze the DVR, secure the incident reports, and preserve the truth.

The Reality of Trampoline Injuries in the City of Celina

The City of Celina is one of the fastest-growing communities in North Texas. As new neighborhoods rise along the Preston Road corridor and near the extension of the Dallas North Tollway, backyard trampolines have become a staple. Simultaneously, families in the City of Celina are just a short drive from a high density of commercial jump parks in Frisco, McKinney, and Plano.

Nationally, more than 300,000 trampoline-related emergency room visits occur every year. In a booming area like the City of Celina, those numbers translate to local families sitting in the ER at Children’s Medical Center Plano or Cook Children’s Prosper, wondering how a Saturday afternoon went so wrong.

The American Academy of Pediatrics (AAP) has been clear since 1999: trampolines do not belong in a recreational environment for children. This isn’t a new concern. It is twenty-five years of medical consensus that manufacturers like Jumpking or Skywalker and park chains like Urban Air or DEFY choose to ignore. Whether your injury happened in a backyard in the City of Celina or a commercial court in Frisco, the mechanism of injury was foreseeable, and the outcome was preventable.

Why Commercial Parks in North Texas Are High-Risk Zones

The business model of a modern trampoline park—what the industry now calls a “Family Entertainment Center” or FEC—is built on throughput. Chains like Sky Zone, Inc. (formerly CircusTrix LLC and backed by Palladium Equity Partners) and Unleashed Brands (the parent of Urban Air, acquired by Seidler Equity Partners in 2023) manage hundreds of parks. To maintain profit margins, staffing often becomes the first variable they cut.

ASTM F2970 is the industry’s own safety standard. It was written by park owners to establish a safety floor. Yet, on a busy Saturday night when the City of Celina families arrive for a birthday party, those standards frequently collapse. We look for the following violations that turn a fun outing into a catastrophe:

  • Collapsed Attendant Ratios: ASTM F2970 best practices suggest one monitor per 32 jumpers. In many North Texas parks, we see ratios of 1:60 or worse.
  • Age and Weight Mixing: When a 200-pound adult lands on a trampoline bed while an 80-pound child from the City of Celina is pushing off, the results of the “double-bounce” are governed by physics, not luck. The child’s launch force can be multiplied by up to 4x.
  • The “Don’t Call 911” Protocol: Documented in reviews of parks like Urban Air Southlake, staff are often instructed by management to downplay injuries and avoid calling emergency services.
  • Foam Pit Compaction: Foam pits look soft, but if the open-cell polyurethane cubes aren’t rotated and replaced, they compact. Your child enters head-first and hits a hard floor 42 inches down.

What Happened: The Physics and Mechanisms of Injury

We don’t handle trampoline cases the way a generalist personal injury firm might. We don’t just say “the park was sloppy.” We retain biomechanical engineers to reconstruct the exact moment of impact. We study the energy transfer that happens in an interconnected trampoline court—a design Sky Zone refers to as “wall-to-wall” but which engineers describe as a massive, unintended catapult system.

The Signature Double-Bounce

This is the most common cause of catastrophic pediatric fractures. As your child jumps, they are timed to the vibration of the mat. If a larger jumper lands at the exact wrong moment, the kinetic energy stores in the bed and launches your child with a force their developing bones cannot absorb upon landing.

For a seven-year-old in the City of Celina, this often results in a comminuted femoral shaft fracture or a Salter-Harris growth plate injury. A growth plate injury at age nine can lead to permanent limb-length discrepancy that isn’t fully visible until age fourteen. If your lawyer doesn’t understand pediatric orthopedics, they will settle your case for a fraction of what those future surgeries will cost.

Foam Pit and Airbag Failures

Foam pits are increasingly being replaced by airbags, but many facilities serving the City of Celina still use the cube model. These pits are notorious for “bottoming out.” We cite the case of Ty Thomasson, who died at a Phoenix park because the foam pit was only 2’8″ deep when it should have been 6′.

Even airbags are not a perfect solution. Under-inflation or pressure leaks can lead to submerged-entrapment or head-strikes against the floor. We demand the PSI logs and maintenance tickets for these attractions as a standard part of our discovery process.

The Urban Air Sky Rider and Harness Attractions

As parks pivot to being FECs, they bolt on attractions like the Sky Rider—an indoor zipline coaster. Urban Air has a documented chain-wide pattern of Sky Rider strangulations and falls, including a 2023 incident in Newnan, Georgia, where a six-year-old was strangled by a harness cord.

In Sugar Land, the Lakhani family’s lawsuit against Urban Air alleges an attendant failed to attach the safety line to a fourteen-year-old girl’s harness, resulting in a thirty-foot fall onto concrete. If your child was hurt on a climbing wall or zipline at an Urban Air near the City of Celina, we look for this pattern of “systemic failure” cited by arbitrator Thomas Bender in the $15.6 million Damion Collins award.

Breaking the Waiver: It Is Not a Wall

The first thing an insurance adjuster will do when you report an injury at a park like Altitude or Launch is tell you that you signed a waiver. They want you to feel guilty. They want you to think you gave away your child’s rights.

In Texas, they are wrong.

Our associate attorney Lupe Peña knows this because he used to defend these cases. Under the Munoz v. II Jaz doctrine, a parent in Texas generally cannot sign away a minor child’s personal injury claim in advance. While the waiver might affect your own derivative claim for medical bills, your child’s right to seek justice for their injuries is protected by Texas public policy.

We attack waivers on multiple fronts:

  1. Gross Negligence: A waiver cannot release a defendant from gross negligence—conduct that involves an extreme degree of risk that the park knew about and ignored.
  2. The Fair Notice Doctrine: Under the Dresser v. Page Petroleum rule, a waiver must be “conspicuous.” If the release was buried in a twenty-page click-through on an iPad at a noisy Frisco kiosk, it may be legally void.
  3. The Signer-Authority Defeat: Many waivers at birthday parties are signed by aunts, grandmothers, or friends’ parents. Texas Family Code § 153.073 is clear: only a legal guardian has the authority to sign for a minor. If the wrong person signed, the waiver fails.
  4. The Bilingual Attack: Under the Delfingen US-Texas v. Valenzuela ruling, if your primary language is Spanish and the park forced you to sign an English-only waiver without translation, that contract may be unenforceable. Hablamos Español. No permitiremos que usen el idioma en su contra.

Catastrophic Pediatric Injuries: The Medical Stakes

Because 75% of trampoline injuries involve children, we have built our practice around pediatric medicine. We currently litigate a $10 million lawsuit against the University of Houston involving rhabdomyolysis and acute kidney failure. Why does that matter for a City of Celina trampoline case? Because the biology of a crush injury or extreme exertion is identical.

Traumatic Brain Injury (TBI) and Concussion

A child’s developing brain is more vulnerable to those “minor” impacts on a trampoline court. We look for signs of Diffuse Axonal Injury (DAI)—shearing of the brain’s connections that often doesn’t show up on a standard CT scan. We work with pediatric neuropsychologists to establish baselines and project the lifetime cognitive impact of a TBI.

Spinal Cord Injury and SCIWORA

Children in the City of Celina can suffer Spinal Cord Injury Without Radiographic Abnormality (SCIWORA). Their spines are more flexible than adults’, meaning the cord can be stretched or bruised even if the bones don’t show a break on an X-ray.

The viral case of Elle Yona, which had over 27 million views on TikTok, involved a vertebral artery dissection leading to a spinal-cord stroke after a backflip. These injuries are often misdiagnosed as panic attacks or muscle strains in the ER. We know the medicine of these neurovascular injuries, and we make sure your child’s medical record captures the full scope of the harm.

Salter-Harris Fractures

These are fractures through the growth plate. If not treated by a specialist who understands the 50-year horizon of your child’s life, these results in crooked limbs or stunted growth. We retain pediatric orthopedic surgeons to build a Life-Care Plan (LCP) that quantifies every surgery, every therapy session, and every vocational loss your child will face over the next seven decades.

Backyard Trampolines and the City of Celina Homeowners

Not every trampoline injury happens at a Sky Zone. In the City of Celina, the backyard trampoline is a standard fixture. While there is no waiver to fight in a backyard case, the liability landscape is complex.

Attractive Nuisance for Child Trespassers

If a neighbor’s child wanders into your yard and is hurt on an unsecured trampoline, Texas law applies the “attractive nuisance” doctrine. Because children of “tender years” are expected to be attracted to trampolines, the homeowner has a duty to secure the equipment with fences, locked gates, and removed ladders.

Product Liability: Manufacturers and Retailers

We pursue manufacturers like Jumpking, Skywalker, and the Walmart private-label brand Bouncepro. If your backyard mat tore or a weld failed, we look at the CPSC recall history. Jumpking had a recall of 1 million units for breaking welds. Bouncepro had 120,000 units recalled for netting failures.

We apply the Bolger v. Amazon and Oberdorf v. Amazon doctrines to hold retailers accountable as sellers, even when the manufacturer is an unreachable offshore entity. If the product was designed in a way that failed your child, we will find the insurance tower to cover the loss.

The Insurance Tower: Finding the Deep Pockets

When you call us about an injury at an Urban Air in McKinney, the adjuster might tell you “the policy is only $1 million.” In a catastrophic case, that won’t cover a single year of attendant care.

We go upstream. The operator in Frisco or McKinney is just the first layer. Above them is the franchisee, then companies like UATP Management LLC (the Urban Air franchisor), and finally the multi-billion dollar private equity firms like Seidler Equity Partners.

We discovered through cases like Damion Collins v. Urban Air that the franchisor can be held liable for up to 40% of the fault because they controlled the safety training and attraction design. We trace the corporate archeology to find the umbrella and excess policies that the park’s staff won’t disclose to you.

How We Build Your Case in the City of Celina

Our process starts the moment you call 1-888-ATTY-911. We don’t handle a trampoline case like a simple slip-and-fall. We build a specialized litigation machine for every client.

  1. Immediate Spoliation: We demand the DVR footage before it is purged.
  2. Forensic Kiosk Pull: We subpoena the metadata of your waiver to see if the signatures were legitimate and if the fair-notice standards were met.
  3. Staff Background Checks: We investigate the monitor on duty. Was it a teenager hired two weeks ago with three hours of training? Washington State L&I recently fined a Sky Zone $68,000 for labor violations involving teen staff. We look for those patterns in North Texas.
  4. Medical Chronology: We don’t just collect bills; we translate the medicine. Whether it’s CK levels for rhabdomyolysis or ASIA grades for a spinal injury, we own the technical data.
  5. Expert Bench: We have a pre-vetted bench of biomechanical engineers, ASTM compliance experts, and pediatric specialists ready to testify.

FAQ: Questions Parents in the City of Celina Search for at 2 AM

Can I sue if I signed the waiver at Urban Air in Frisco?

Yes. In Texas, a parent generally cannot waive a child’s right to sue for personal injuries. Additionally, no waiver covers gross negligence. If the park failed to maintain its equipment or follow ASTM F2970 staffing ratios, the waiver is often legally irrelevant.

My child has dark urine after jumping at a trampoline park. Is that normal?

No. This can be a sign of exertional rhabdomyolysis, where muscle tissue breaks down and poisons the kidneys. This is a medical emergency. Go to the ER immediately and ask for a CK blood test. Our firm has significant experience with these cases through our $10M university litigation.

Who is responsible if my kid was double-bounced by an adult?

The park is responsible. ASTM F2970 requires parks to separate jumpers by size and age. If an attendant allowed an adult and a small child to share a court, they violated the industry’s own safety standard.

How much is a trampoline injury case worth?

It depends on the severity. Veredicts like the $11.485M Cosmic Jump award or the $15.6M Collins award show the ceiling for catastrophic injuries. Even moderate fracture cases can range from $500,000 to over $2,000,000 when growth plate damage is factored in.

The park manager said they won’t give me the video without a subpoena. Is that true?

Yes, and by the time a standard subpoena arrives, the video is usually gone. This is why we send emergency spoliation notices within 24 hours to legally compel them to save the footage.

What if my child was hurt at a birthday party where I didn’t sign the waiver?

If a party host signed on your behalf, they likely had no legal authority to do so. This is a major “waiver gap” we exploit to bring cases into court that the park tries to push into arbitration.

Does homeowners insurance in the City of Celina cover backyard injuries?

Many policies in North Texas have a “trampoline exclusion.” We look at your umbrella policy and the manufacturer’s product liability tower to find the necessary coverage.

Why Choose Attorney911 for Your Celina Case?

Families in the City of Celina deserve more than a “local lawyer” who handles everything from divorces to car wrecks. You need a firm that has spent 25 years fighting Fortune 500 companies like BP and Walmart. You need a firm that knows exactly which buttons to push with the corporate parents of Sky Zone and Urban Air.

We represent families. We represent children. We represent the parent who is currently sitting in a room at Children’s Health, looking at a body cast, and wondering how they will pay for the recovery.

As client Chad Harris said, “You are NOT just some client… You are FAMILY to them.” We treat your child’s recovery as our own. We work on a contingency fee—no fee unless we win—and we advance all the costs of these expensive engineering and medical experts.

Your child’s case depends on what gets preserved this week. The DVR is erasing. The incident report is being “sanitized” by corporate risk managers. The witnesses are scattering.

Call 1-888-ATTY-911.
Hablamos Español.
The consultation is free. The case starts today.

What happened to your child at an adventure park serving the City of Celina wasn’t an accident. It was the predictable output of a multi-million-dollar industry that counts on you not knowing your rights. We know the industry. We know the law. And we know how to hold them accountable.

Establishing the Duty of Care: ASTM and the North Texas Reality

In the legal world, we talk about “the standard of care.” At a trampoline park near the City of Celina, that standard isn’t a suggestion; it’s a blueprint for whether your child leaves the facility on their feet or in an ambulance.

The industry’s own standard, ASTM F2970, dictates everything from foam pit depth to the number of attendants on a court. When a park like Sky Zone in Frisco or Urban Air in McKinney operates with fewer monitors than the standard requires, they are not just being “busy.” They are violating the safety floor their own industry admitted was necessary.

The Problem with Voluntary Standards

The fundamental issue for families in the City of Celina is that most of these standards are voluntary. Texas has not incorporated ASTM F2970 into state law the way New York or New Jersey have. In those states, a violation of the standard is “negligence per se.” In Texas, it is “evidence of negligence.”

This is why you need a lawyer who doesn’t just “handle injury cases.” You need a lawyer who has memorized ASTM F2970 and knows how to use the international standard, EN ISO 23659:2022, as a benchmark for what real safety looks like. We show the jury that while the rest of the world mandates safety, North Texas parks treat it as an optional expense.

Identifying the Decision Makers: Who Really Owns the Risk?

When we file a lawsuit for a City of Celina injury, we don’t just name the local LLC. We perform corporate archeology.

The entity that operates the park is usually a “special purpose entity”—a shell with no assets and a small insurance policy. Above them sits the franchisee, the franchisor, and ultimately, the private equity sponsors like Seidler Equity or Palladium Equity Partners.

These PE sponsors approve the budgets. They approve the cost-cutting measures that result in an untrained teenager supervising your child. When we sue, we go upstream to the money. We utilize the Sampson doctrine of apparent agency to show that because the park uses a national brand’s name, uniforms, and advertising, the national franchisor is just as responsible as the local operator.

Catastrophic Injuries: A Deep Dive into Pediatric Medicine

A trampoline injury at age seven isn’t the same as a trampoline injury at age thirty-seven. Children’s bones are essentially “wet wood”—they bend before they break, and when they do break, they do so in ways that impact the growth centers.

The Menace of the Salter-Harris II Fracture

This is the most common trampoline-park fracture. It involves the physis (growth plate) and the metaphysis. If this isn’t managed by a pediatric specialist at a trauma center like Children’s Medical Center Dallas, the growth plate can prematurely close. A child from the City of Celina may end up with a leg that stops growing, necessitating limb-lengthening surgeries that involve breaking the bone and using external fixators over months.

SCIWORA and the Pediatric Spine

We focus heavily on SCIWORA cases because they are the most tragic examples of “the park should have known better.” After a head-first foam pit entry, a child may have a “normal” CT scan. But because of their ligamentous laxity, the spinal cord can stretch and snap back, causing microscopic bleeding and permanent paralysis.

We work with neurologists who can identify the subtle signs of spinal cord infarction. We look at the case of Elle Yona, whose TikTok journey showed the world that a “panic attack” diagnosis in the ER can actually be a life-altering vertebral artery dissection.

The Evidence Clock: Why the City of Celina Families Can’t Wait

Evidence at a trampoline park is ephemeral. It is designed to be erased.

  1. Surveillance DVRs: Most parks use NVR or DVR systems that overwrite old footage every week. If you wait 21 days to call us, the video of your child’s accident is gone forever.
  2. Kiosk Metadata: The “waiver” you signed exists in a cloud database. We subpoena the audit logs to see if you were actually given time to read it.
  3. Attendant Shift Logs: These show who was on duty and where. Monitors at parks have a 130-150% annual turnover. If we don’t track them down in the first month, they are likely gone.

We send our litigation-hold letters immediately. We don’t ask the park nicely; we put them on formal notice that any destruction of evidence will result in a “spoliation” instruction to the jury—telling the jury to assume the destroyed evidence showed the park was guilty.

Building the Damages: The 70-Year Horizon

If your child is eight years old and suffers a permanent spinal injury or TBI, their medical needs don’t end in two years. They extend for seventy years.

We build a Life-Care Plan (LCP). This document, prepared by our experts, itemizes every wheelchair replacement, every hour of home health care, every corrective surgery, and every vocational loss your child will suffer over their entire natural life.

While the park’s insurer wants to offer you a settlement based on your current ER bill, we anchor our demands in the $5 million to $25 million range that these catastrophic cases command. We don’t settle for the bills you have; we settle for the life your child lost.

Why Hire Attorney911?

We are based in Houston, but we are a North Texas fixture for catastrophic injury.

  • Ralph Manginello: Founder, Federal Court veteran, 25+ years of making corporate defendants pay.
  • Lupe Peña: The “Waiver Killer.” He spent years on the other side. He knows their playbook because he wrote it.
  • Medical Mastery: Our active $10M UH rhabdomyolysis case gives us a medical infrastructure that generalist firms can only dream of.
  • No Risk: We advance all costs. If we don’t win, you don’t pay.

1-888-ATTY-911 is answered 24/7.
We are ready to send our investigators to the City of Celina or your local park today. Your family’s future is decided by what you preserve this week.

Call us. Let’s start the fight for your child’s recovery.

Share this article:

Need Legal Help?

Free consultation. No fee unless we win your case.

Call 1-888-ATTY-911

Ready to Fight for Your Rights?

Free consultation. No upfront costs. We don't get paid unless we win your case.

Call 1-888-ATTY-911