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City of Willow Park Trampoline Park Injury and Pediatric Catastrophic Injury Attorneys Attorney911 of Houston TX: 25+ Years Defeating Sky Zone Urban Air DEFY and Altitude Waivers with Former Recreational-Business Defense Insider Lupe Peña and Ralph Manginello; Expert Litigation for Sky Rider Strangulation Climbing Wall Falls and Backyard Jumpking Skywalker Defects across Parker County; Masters of ASTM F2970 EN ISO 23659:2022 and AAP Standards leveraging $11.485M Cosmic Jump Harris County Verdict and $15.6M Damion Collins Urban Air Arbitration Precedent; Pediatric Trauma Specialists for TBI SCIWORA Salter-Harris Growth Plate and Rhabdomyolysis from Double-Bounce or Foam Pit Impact; Hablamos Español utilizing Delfingen Bilingual-Waiver Defeat and Texas Family Code 153.073 Signer-Authority Tactics in the City of Willow Park region; Free Consultation with No Fee Unless We Win 1-888-ATTY-911

April 26, 2026 13 min read
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#”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’s femur snapped during a “Toddler Time” session at a trampoline park. Her warning, shared over 240,000 times on social media, echoed a terrifying reality that thousands of families in City of Willow Park and across North Texas face every year. You took your child to a place like Urban Air in Hudson Oaks or an Altitude Trampoline Park in Fort Worth because you wanted them to have fun. You signed a waiver at a kiosk because the line was long. You believed the marketing that said these parks were safe, supervised, and designed for family enjoyment.

Then the double-bounce happened. Or the foam pit bottomed out. Or the harness on the climbing wall wasn’t secured.

If you are reading this at 2:00 AM from a chair in a pediatric trauma bay at Cook Children’s or Children’s Medical Center, we have two things to tell you. First, this is not your fault. You didn’t know the park was operating at half its required staff. You didn’t know the foam blocks hadn’t been rotated in three months. Second, the “Participation Agreement” you signed is not the absolute shield the insurance adjuster wants you to believe it is.

We are Attorney911. Our managing partner, Ralph Manginello, has spent over 25 years holding corporate giants accountable. Our team includes Lupe Peña, an attorney who used to defend insurance companies and recreational facilities against these exact claims. He knows the playbook they are using against you right now because he helped write it. Today, we use that inside knowledge to dismantle their defenses and recover the multi-million dollar settlements these catastrophic injuries require.

What happened to your child in City of Willow Park wasn’t an accident. It was the predictable output of a business model that prioritizes margin over minor safety. We are here to change that. Call us at 1-888-ATTY-911. Hablamos Español. No fee unless we win.

The Architecture of Negligence: Why Trampoline Parks Fail City of Willow Park Families

A trampoline park injury is almost never a “freak accident.” In the legal world, we call it a “foreseeable event.” The American Academy of Pediatrics (AAP) has formally advised against recreational trampoline use since 1999. They reaffirmed this in 2012 and again in 2019. For over a quarter-century, the medical community has warned that these devices are inherently dangerous for children.

The industry knows this. In fact, the trampoline park industry wrote its own safety standard, ASTM F2970. They set the rules for themselves: how deep a foam pit must be, how many “court monitors” must be watching every jumper, and how to separate age and weight groups to prevent the “double-bounce” catapult effect.

The problem is that in Texas, compliance with ASTM F2970 is voluntary. There is no state agency in Austin that inspects trampoline decks. While the Texas Department of Insurance (TDI) regulates “Class B” inflatable attractions like bungee trampolines and indoor coasters under Texas Occupations Code Chapter 2151, the core trampoline courts are left in a regulatory vacuum.

When a park in the City of Willow Park area chooses to staff a Saturday afternoon with one 17-year-old attendant for 50 jumpers, they are knowingly operating below the safety floor. When they allow a 200-pound adult to jump adjacent to a 50-pound child, they are defying the physics of energy transfer that they admitted was dangerous when they helped write the ASTM standards. That is not an accident; it is gross negligence.

The Double-Bounce: The Physics of a Shattered Tibia

We see it in almost every double-bounce case we handle. The physics are brutal and unforgiving. When a heavier jumper lands on a trampoline mat at the same time a lighter child is pushing off, the kinetic energy from the heavier mass is transferred into the smaller body. This can multiply the child’s launch force by up to 400%.

The child isn’t jumping anymore; they are being launched like a projectile. On the way down, the child’s developing musculoskeletal system cannot absorb the impact. The result is often a comminuted femoral shaft fracture or a Salter-Harris growth plate injury. A Salter-Harris fracture at age nine means the bone that should have grown for a another decade may never grow straight again. These are the life-altering outcomes our firm investigates using forensic biomechanical engineers.

The Five-Layer Defendant Stack: We Go Upstream

If your child was hurt at a chain location near City of Willow Park, the park manager might tell you, “We’re just a small local business.” That is the first layer of the liability shield. We are built to pierce it.

When we file a trampoline injury lawsuit in Parker County or Tarrant County, we don’t just sue the local LLC. We perform corporate archeology to find the deep pockets. Our 5-layer defendant stack typically includes:

  1. The Operator LLC: The entity on the lease in City of Willow Park. They are often undercapitalized, carrying only a $1 million primary policy that won’t cover a week in the ICU.
  2. The Franchisee: The ownership group that may run ten or twenty Urban Air or Sky Zone locations.
  3. The Franchisor: Entities like Sky Zone Franchising LLC or Urban Air Franchise Holdings. They mandate the training manuals and staffing levels. They are liable when they retain control over the safety protocols that failed your child.
  4. The Corporate Parent: Sky Zone, Inc. (formerly CircusTrix LLC), backed by Palladium Equity Partners, or Unleashed Brands, acquired by Seidler Equity Partners in 2023. These are massive conglomerates with sales exceeding $600 million.
  5. The Private Equity Sponsor: The firms that approve the cost-cutting measures that lead to understaffing.

Our experience litigating against Fortune 500 companies like BP, Walmart, and Amazon means we aren’t intimidated by a fleet of corporate lawyers. We know that the franchisor and the PE sponsor often carry umbrella and excess insurance layers reaching $25 million to $100 million. Through-Line #13 is our mission: Every insurance layer exists, and we will discover it.

Verbatim Parent Evidence: The “NOT Call 911” Pattern

We don’t rely solely on what the park tells us. We listen to what parents tell the world. At an Urban Air in Southlake, a parent disclosed a chilling instruction from management: “Employees are specifically instructed by management to NOT call 911… staff have been told by management to down-play injuries.”

This is a systemic tactic used to minimize incident reporting and protect the park’s insurance premiums. When a park delays an ambulance for 20 minutes while they pressure you to sign an incident report, they aren’t helping your child—they are destroying evidence. Every minute of delay is a minute where the DVR surveillance gets closer to overwriting. We send spoliation letters within 24 hours of being hired to stop this destruction in its tracks.

The Waiver Is Not a Wall: How We Win in Texas

The most common reason parents in City of Willow Park don’t call a lawyer is the waiver. They think because they clicked “I Agree” at a kiosk, they’ve signed away their child’s life. In Texas, that is simply not true.

The Munoz Rule: You Cannot Waive Your Child’s Rights

Since 1993, the landmark case Munoz v. II Jaz, Inc. has stood for a clear principle: a parent in Texas CANNOT waive a minor’s personal injury cause of action. While the Texas Supreme Court’s 2025 decision in Cerna v. Pearland Urban Air made it easier for parks to force cases into arbitration, it did not change the fact that the child’s claim for damages survives.

The Dresser Test for Adults

For adult victims, the waiver must pass the “Fair Notice” doctrine established in Dresser Industries v. Page Petroleum. The release must be conspicuous (bold, contrasting, or set apart) and it must satisfy the express negligence doctrine (explicitly stating it covers the park’s own negligence). Most kiosk waivers are a jumble of small text that fails this legal test.

The Moriel Gross Negligence Carve-Out

Furthermore, no waiver in Texas can release a defendant from gross negligence. In the Harris County case of Cosmic Jump, the jury looked at a torn trampoline slide that the park knew about and refused to fix. They found the park grossly negligent and awarded $6 million in punitive damages despite the signed waiver. That is the kind of case we are built to handle.

If the park knew their court monitor was on his phone, if they knew the foam pit was only 3 feet deep instead of the required 6, or if they knew the harness was failing and kept the climbing wall open anyway—the waiver is essentially noise.

Catastrophic Injuries and the Rhabdo Bridge

Trampoline accidents produce injuries that pediatric surgeons usually only see in high-speed car wrecks.

  • SCIWORA (Spinal Cord Injury Without Radiographic Abnormality): This is a terrifying pediatric phenomenon where a child’s neck is injured even though the X-ray looks normal. Our firm knows to look for the MRI signatures other firms miss.
  • Salter-Harris Fractures: A break through the growth plate that can cause permanent limb-length discrepancy.
  • Vertebral Artery Dissection: As seen in the viral Elle Yona TikTok case (27M+ views), a flip can tear the artery in the neck, causing a spinal cord stroke. These are often misdiagnosed as panic attacks in the ER.

The $10 Million Rhabdomyolysis Case

Attorney911 is currently litigating a $10 million lawsuit against the University of Houston involving rhabdomyolysis and acute kidney failure. This is the exact same pathophysiology we see in trampoline park cases where children jump for 90 minutes in a hot building without adequate water.

When muscle tissue breaks down from overexertion or crush injuries, it releases myoglobin into the blood, which clogs the kidneys. If your child had “cola-colored” urine or rock-hard muscle pain after a visit to a park near City of Willow Park, they may be in acute kidney failure. We have the medical experts and the litigation architecture already built for this specific emergency.

The Evidence Clock: Why the Next 7 Days Are Critical

In City of Willow Park and throughout Parker County, the clock is ticking. Most trampoline park DVR systems are set to overwrite footage in as little as 7 to 30 days. The kiosk database that holds the version of the waiver you signed might purge metadata every 72 hours.

By the time you get your child home from the hospital, the evidence that would prove the attendant wasn’t at his station may already be gone. We file fast. We send certified spoliation demands to the park’s general counsel and insurance carrier the day you hire us.

We also investigate ex-employees. Staff turnover at these parks is 150% a year. The teenager who saw what happened last Saturday might not work there next month. We find them on LinkedIn and through labor department records (like the Sky Zone Tukwila $68K L&I citation) to get the truth before the park’s lawyers can coach them.

Why City of Willow Park Families Choose Attorney911

We represent families, not files. When client Chad Harris said, “You are NOT just some client… You are FAMILY to them,” he was describing the core philosophy of Ralph Manginello and Lupe Peña.

  • 25+ Years Experience: We’ve faced the corporate defense firms that parks hire.
  • Insurance Defense Inside Edge: Lupe Peña used to represent the other side. He knows where they hide the policy documents and how they coach their adjusters.
  • No Upfront Costs: We advance every expense—the biomechanists, the life-care planners, the pediatric surgeons. We only get paid if you win.
  • Hablamos Español: Su familia merece comunicación directa. Lupe Peña habla español nativo y maneja su caso personalmente.

Frequently Asked Questions for City of Willow Park Parents

Can I sue if my child was hurt at a birthday party?

Yes. Often, the “party host” signs a master agreement, but the guests never signed a waiver. This is a massive gap in the park’s defense. Even if you did sign, the Munoz rule in Texas protects your child’s right to sue.

How much is a trampoline park injury case worth?

It depends on the severity. Catastrophic spinal injuries can reach $10M-$25M in lifetime care costs. Complicated fractures with growth plate damage often anchor in the $500K-$2M range. We build a Pediatric Life-Care Plan to ensure we aren’t just paying today’s hospital bill, but for the next 70 years of your child’s life.

The park’s insurance offered us $3,000 for medical bills. Should I take it?

No. That is the “Med-Pay Trojan Horse.” On the back of that check is usually a release that ends your case. Taking that $3,000 might prevent you from recovering the $1 million your child actually needs for future surgeries.

What if I didn’t see the accident happen?

That’s why we demand the surveillance footage. Modern parks like Urban Air and Sky Zone have dozens of camera angles. We retain digital forensic examiners to pull the original files and make sure no “glitches” occur at the moment of injury.

My child was hurt on a backyard trampoline. Is there a case?

Backyard cases involve Attractive Nuisance laws. If a neighbor’s trampoline was unsecured or defective, their homeowners’ insurance or the manufacturer (Jumpking, Skywalker, Springfree) may be liable. We look at CPSC recall histories—like the 2026 SEGMART toddler trampoline strangulation recall—to prove the product was defective.

Your Path to Justice Starts Today

The trampoline park is hoping you believe the waiver. They are hoping you are too busy with doctor appointments to call a lawyer. They are counting on their surveillance video to overwrite.

Don’t let them win. What happened to your child at an Urban Air, Altitude, or Sky Zone in the Parker County area needs to be documented, litigated, and paid for.

Call 1-888-ATTY-911 right now. We are available 24/7. We offer free consultations, and we work on a contingency basis—meaning your child’s recovery fund stays intact while we fight the corporate giants.

1-888-ATTY-911. The case starts today.

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