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Blog | City of Lewisville

City of Lewisville Trampoline Park & Pediatric Catastrophic Injury Attorneys Attorney911 of Houston TX Ralph P Manginello 25 Years Federal Court Admitted & Former Recreational-Business Defense Attorney Lupe Peña Defeating Sky Zone Urban Air DEFY Altitude and Launch Waivers with the Waiver-Defeat Edge for Pediatric TBI SCIWORA Spinal Cord Injury Salter-Harris Growth Plate Fractures and Rhabdomyolysis using ASTM F2970 EN ISO 23659:2022 Standards Mastery to Hold Sky Zone Inc Palladium Equity and Unleashed Brands Seidler Equity Accountable with Verified Case Anchors like the $11.485 Million Cosmic Jump Harris County Verdict $15.6 Million Damion Collins Urban Air Arbitration and Active $10 Million UH Rhabdo Lawsuit against Commercial Parks Backyard Jumpking Skywalker Springfree Manufacturers Sky Rider Strangulation and Climbing Wall Falls using the Delfingen Bilingual Doctrine & Texas Family Code 153.073 Signer-Authority Attacks for Absolute Corporate Accountability and No Fee Unless We Win 1-888-ATTY-911

April 25, 2026 17 min read
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One bounce. One bad landing. One broken neck. That is the timeline of a catastrophic injury at a trampoline park in Lewisville, and for many families, it is a nightmare that begins in the seconds it takes for a court monitor to check their phone.

At the Launch Family Entertainment center off the I-35E frontage road in Lewisville, or the nearby Urban Air and Sky Zone locations serving Denton County, thousands of children are airborne every weekend. They are jumping at facilities that market “safe family fun” while operating under a business model that prioritizes throughput and margin over the survival of your child’s growth plates. When your child comes off a court on a stretcher at Medical City Lewisville, and the manager hands you a clipboard instead of calling 911, you are seeing the first layer of a corporate defense system designed to isolate the park from the consequences of its own decisions.

We are Attorney911. With over 25 years of experience fighting Fortune 500 corporations, Managing Partner Ralph Manginello has built a firm that doesn’t just handle personal injury cases—we dismantle corporate liability shields. We know that a trampoline injury in Lewisville is never an “accident.” It is the predictable output of a business decision to operate below the safety floor established by the industry’s own standards.

Whether your child was injured by a double-bounce energy transfer at a commercial park or a defective net failure on a Jumpking or Skywalker trampoline in a Castle Hills backyard, the path to accountability is the same. It requires a firm that has memorized ASTM F2970, that knows why the American Academy of Pediatrics has warned against trampolines since 1999, and that has an attorney like Lupe Peña on staff—someone who used to sit on the other side of the table defending these very businesses. We know their playbook because we helped write it. Now, we use it to make them pay.

Call 1-888-ATTY-911. We answer 24/7, and we advance every cost of your investigation. In the next seven days, the evidence of what happened to your child will begin to disappear. We are ready to freeze it in place.

The Reality of Trampoline Injuries in Lewisville: Why “Accident” is a Lie

When a parent hears their child let out what Kati Hill described to ABC News as “the worst scream that you could ever have heard from a child,” the immediate instinct is self-reproach. You signed the waiver. You let them jump. You think it was just bad luck.

The park wants you to believe that. Their entire insurance architecture—from the operator LLC to the private equity sponsors like Palladium Equity Partners or Seidler Equity Partners—is built on the myth of the “freak accident.” But physics and industry standards tell a different story.

The Foreseeability Stack

Your child’s injury was foreseen on at least six independent levels before you even pulled into the Lakepointe Crossing parking lot:

  1. The AAP Guidance: The American Academy of Pediatrics has formally advised against recreational trampoline use since 1999. That is over a quarter-century of medical consensus that these products maim children.
  2. ASTM F2970: This isn’t a government rule—it is a standard the trampoline park industry wrote about itself to establish a safety floor. When a Lewisville park operates with an attendant-to-jumper ratio of 1:60 on a Saturday instead of the required 1:32, they are knowingly violating their own peers’ rules.
  3. CPSC Tracking: The Consumer Product Safety Commission has tracked approximately 300,000 trampoline-related ER visits annually for decades. The park operators in Denton County know these numbers.
  4. Franchisor Operations Manuals: Sky Zone Franchising LLC and Urban Air Franchise Holdings maintain manuals that mirror F2970. The franchisor knows what the duty is; the injury happens when they fail to enforce it.
  5. Prior Incident Notice: Documented patterns, like the Sky Rider zipline strangulations at multiple Urban Air locations or the “Don’t Call 911” instructions reported at Urban Air Southlake, prove that these aren’t isolated events.
  6. Corporate Decision-Making: Discovery in our cases often surfaces internal risk-management emails where a corporation chose to cut staff or defer foam-pit maintenance to save on overhead.

When we litigate a case in Lewisville, we don’t argue that the park was “careless.” We prove that the park made a calculated decision to accept the risk of your child’s injury in exchange for a higher margin. That is the definition of gross negligence in Texas, and it is how we defeat the waiver you signed at the kiosk.

If you are facing the cost of a lifetime of care for a spinal cord injury or a traumatic brain injury, you need an attorney who treats your family like his own. As our client Chad Harris said, “You are NOT just some client… You are FAMILY to them.” At Attorney911, we fight for our family.

Understanding the Double-Bounce: The Physics of Pediatric Catastrophe

The most common mechanism of injury at trampoline parks in Lewisville—and the one most often ignored by court monitors—is the double-bounce.

Imagine a 200-pound adult jumping near a 60-pound child. As they jump out of phase, the trampoline bed stores elastic potential energy. If the adult lands at the same instant the child is pushing off, that energy transfers through the mat. The child isn’t just jumping anymore; they are being launched by a catapult. This mass-ratio energy transfer can multiply the child’s launch force by up to 4x.

The resulting injuries are often what we call “trampoline fractures”—proximal tibial metaphysis buckle fractures—or more severe comminuted femoral shaft fractures. For an eight-year-old, this often means a Salter-Harris Type II fracture of the growth plate.

This is not a “broken leg.” It is a decade of orthopedic monitoring, potential limb-length discrepancy, and corrective osteotomy. A pediatric bone is biomechanically distinct and more pliable than an adult’s, yet its growth plates are the weak point that fails under loads an adult skeleton would survive. When a Lewisville park fails to enforce age and weight separation, they are allowing a mass-ratio collision that physics guarantees will end in a fracture.

We currently litigate a $10 million lawsuit against the University of Houston involving rhabdomyolysis and acute kidney failure—the result of institutional failure to monitor physical exertion. We apply that same medical-litigation architecture to trampoline cases. We know which experts to call—the biomechanical engineers who can model that 4x launch force and the pediatric orthopedic surgeons who can testify to the lifetime impact of a destroyed physis.

The Lewisville Liability Map: Who Really Pays for the Injury?

Most personal injury firms in North Texas will sue the local LLC running the park and stop there. They’ll tell you the policy limit is $1 million and suggest you settle.

We don’t. At Attorney911, we perform corporate archeology on every case to find the money upstream. The entity operating the park in Lewisville is usually an undercapitalized LLC designed to be a liability shield. But the money is in the 5-layer defendant stack:

  1. Operator LLC: The local business on the lease.
  2. Franchisee: The multi-unit ownership group.
  3. Franchisor: Sky Zone Franchising LLC or Urban Air Franchise Holdings, who retain operational control over training and safety.
  4. Corporate Parent: Sky Zone, Inc. (renamed from CircusTrix) or Unleashed Brands, often backed by deep-pocketed private equity like Palladium Equity Partners.
  5. Private Equity Sponsor: The ultimate source of the cost-cutting mandates that lead to understaffing.

In the Damion Collins v. Urban Air Overland Park case, an arbitrator awarded $15.6 million, with 40% of the fault allocated to the franchisor, UATP Management LLC. The arbitrator found a “systemic failure” to implement safety changes despite recognized risks. That is the blueprint we use. If the park in Lewisville failed your child, we don’t just look at the teenage monitor; we look at the executive board in Dallas or Grapevine that decided a 1:60 ratio was “good enough” for your family.

We also discover every insurance layer. The primary GL policy is just the floor. We find the umbrella, the excess layers, the franchisor’s “additional insured” coverage, and the manufacturer’s product-liability policy. If your injury happened in a backyard in neighborhoods like Vista Ridge or Valley Ridge, we examine the homeowner’s policy and any potential attractive nuisance claims against the manufacturer of a defective net or frame.

The Waiver is Noise, Not a Wall: Why Lewisville Families Can Still Sue

The first thing an insurance adjuster will tell you when they call your home in Lewisville is, “You signed a waiver, so there’s nothing we can do.”

This is a lie. Our firm includes an attorney, Lupe Peña, who used to write and defend those very waivers. He knows the holes in them because he used to try to patch them. We attack Lewisville trampoline park waivers on five distinct vectors:

1. The Gross Negligence Carve-Out

No state, including Texas, enforces a waiver for gross negligence. Under the Moriel standard, if a park has subjective awareness of an extreme risk (like a torn slide or an unmonitored foam pit) and proceeds with conscious indifference, the waiver is void. The Cosmic Jump $11.485 million verdict in Harris County proved this: the jury looked past the signed waiver because the park knew the equipment was dangerous.

2. The Dresser Fair-Notice Doctrine

Texas law requires that a release of negligence be “conspicuous.” It must use the specific word “negligence” and be bolded, capitalized, or otherwise set apart. If the Lewisville park’s kiosk waiver buried that language in a 20-screen click-through, it fails the “fair notice” test and becomes unenforceable.

3. The Munoz Rule (Parental Indemnity)

Under Munoz v. II Jaz Inc., a parent in Texas generally cannot sign away a minor child’s independent right to sue for personal injuries. Your signature might bar your claim for medical bills, but it does not stop your child from seeking justice for their own permanent impairment.

4. Signer Authority Defects

Was the waiver signed by a grandmother, an aunt, or a friend’s parent at a birthday party? Texas Family Code § 153.073 says only a legal guardian can bind a minor. At birthday party buyouts in Lewisville, non-guardian signatures are rampant. Every one of those signatures destroys the waiver’s legal footing.

5. Multilingual Formation Defects

If your family speaks Spanish and the park only provided an English waiver on an iPad at a crowded counter, the Delfingen doctrine may invalidate the agreement. We represent many Hispanic families in Denton County, and we know that a language barrier is an insurance tactic, not a legal defense. Hablamos Español. Llame al 1-888-ATTY-911. Lupe Peña habla con usted directamente.

Catastrophic Injuries: What the Medical Literature Says

Trampoline injuries in Lewisville aren’t just “accidents”—they are medical emergencies with specific radiographic signatures. We follow the AJR 2024 “Pediatric Trampoline Injuries Head to Toe” radiographic essay, which found that up to 1.6% of pediatric ED trauma visits are now trampoline-related.

Traumatic Brain Injury (TBI)

A head-first landing in a foam pit that has compacted past the ASTM F2970 8-inch specification can cause Diffuse Axonal Injury (DAI). This is the shearing of brain fibers that often won’t show up on an initial CT scan. We look for signs of Second-Impact Syndrome—a fatal swelling of the brain that occurs if a child is allowed to return to jumping after an initial, un-diagnosed concussion.

Cervical Spine and SCIWORA

Pediatric cervical spines are ligamentous and highly mobile. A child can suffer a spinal cord injury without a visible fracture on a scan—a condition called SCIWORA (Spinal Cord Injury Without Radiographic Abnormality). We have seen cases like Elle Yona’s, where a vertebral artery dissection after a backflip was misdiagnosed as a panic attack, leading to permanent quadriplegia.

Exertional Rhabdomyolysis (Rhabdo)

This is the hidden crisis of the industry. Imagine a child jumping for 90 minutes straight in a Lewisville park running at 85°F without water. Their muscle cells rupture, spilling myoglobin into the blood. 24 hours later, the child has cola-colored urine and hit-by-a-truck muscle pain. If the ER misses the CK (creatine kinase) levels, the child can end up in acute kidney failure. Because we are currently litigating a $10 million rhabdo case against the University of Houston, we have the medical experts ready to prove this condition was caused by the park’s failure to provide hydration and mandatory rest breaks.

48-Hour Evidence Preservation: The Clock is Ticking in Lewisville

Your child’s case is decided by what we preserve this week. The trampoline park’s risk management team is already at work, and their system is designed to overwrite evidence:

  • Surveillance DVRs: Most Denton County parks use systems that overwrite every 7, 14, or 30 days. Once that footage is gone, the “the attendant was watching” lie becomes harder to beat.
  • Incident Report Revisions: The original report filed the night of the injury is the truth; the “finalized” version in their computer system is usually a sanitized defense document. Our forensic discovery pulls the metadata to show the edits.
  • Waiver Kiosks: Versions of these digital agreements are sometimes purged on 72-hour rolling cycles.
  • The Equipment: A broken spring or a torn mat will be replaced overnight. The “unstable bed” evidence in a recent $1M Kansas settlement is only possible if you photograph the defect immediately.

Our spoliation letter goes out within 24 hours of your retention. We demand the DVR hard drive, the employee training files, and the daily inspection logs. We don’t wait for them to “lose” the video. We freeze it.

Frequently Asked Questions for Lewisville Families

“Can I sue if I signed the waiver?”

Yes. In Texas, waivers do not cover gross negligence or reckless disregard for safety standards. Furthermore, under the Munoz rule, your signature cannot waive your minor child’s right to sue a commercial operator. The Cosmic Jump $11.485M Harris County verdict stands as the definitive answer for Texas parents: the waiver did not stop that jury, and it shouldn’t stop you.

“How long do I have to sue a trampoline park in Texas?”

The statute of limitations for personal injury in Texas is generally two years from the date of the accident. For a minor, this clock is tolled until their 18th birthday—meaning they have until age 20 to file. However, waiting is a catastrophic mistake for your evidence. The video of the monitor on their phone will be gone in 30 days. Call us today to preserve your proof.

“What is a ‘double bounce’ and why is it dangerous?”

A double-bounce happens when a heavier jumper lands at the same time a lighter jumper is launching. Rebound energy from the adult is transferred into the child, multiplying their launch force by up to 4x. ASTM F2970 requires parks to separate jumpers by age and weight specifically to prevent this. Allowing it to happen is evidence of negligence.

“They wouldn’t call 911 for my child—is that legal?”

While “duty to rescue” laws vary, a park policy that instructs employees to downplay injuries and avoid 911 calls—a pattern reported at Urban Air Southlake—is evidence of collective conscious indifference. It is a gross deviation from the standard of care that can turn an ordinary injury into a punitive-damages case.

“Is an iPad or kiosk waiver really enforceable?”

Texas courts use the Dresser conspicuousness test. If the waiver was a “clickwrap” agreement presented under time pressure at a busy Lewisville counter, with key terms buried in a scroll box, it may be void for lack of fair notice.

“What if my child’s urine is dark brown after the park visit?”

This is a medical emergency. Go to the ER at Medical City Lewisville or a pediatric trauma center like Children’s Medical Center Dallas immediately. Ask for a creatine kinase (CK) test. This is a classic symptom of exertional rhabdomyolysis, which can lead to kidney failure. Once your child is stable, call us. We know how to litigate rhabdo cases.

Why Choose Attorney911 for Your Lewisville Case?

Most firms handle a trampoline case like a slip-and-fall. They don’t know the physics, the corporate archeology, or the medical depth. We do.

  • Ralph Manginello brings 25+ years of federal court experience and is battle-tested against Fortune 500 defendants like BP. The parent companies behind Sky Zone and Urban Air don’t intimidate us.
  • Lupe Peña was an insurance defense attorney. He knows the adjusters’ scripts because he used to help write them. He knows where the holes are in their waivers.
  • No Fee Unless We Win: You pay zero dollars upfront. We advance the costs for biomechanical engineers, ASTM experts, and life-care planners. Your child’s recovery fund stays intact while we fight the corporate lawyers.
  • Bilingual Representation: Hablamos Español. No interpreters, no delays. Your rights are explained by an attorney who speaks your language.

When one company told client Donald Wilcox they wouldn’t accept his case, he called us. “Then I got a call to come pick up this handsome check,” he said. We take the difficult cases and we win the big fights.

The Kill-Shot: It Was Architecture, Not an Accident

What happened to your child at a park in Lewisville wasn’t an accident—it was the predictable output of a system. The AAP has been warning about these hazards since 1999. The industry wrote ASTM F2970 specifically to establish a safety floor, and then the park operated below that floor to hit a margin target. The corporate lawyers drafted a waiver they hoped would scare you off, and the surveillance system is timed to delete the truth before you can find a lawyer.

Attorney911 was built for exactly this fight. Ralph Manginello and Lupe Peña bring the expertise, the former-defense perspective, and the medical-litigation experience from the University of Houston rhabdo case to every trampoline matter we take.

Your child’s case is decided by what gets preserved this week. Surveillance DVRs in Lewisville overwrite in as little as 7 days. Waiver databases purge. Attendants move on. Wait for the adjuster’s “friendly” call, and your case may already be lost.

Call 1-888-ATTY-911 today. Hablamos Español. No fee unless we win. We advance every expense—the biomechanist, the pediatric surgeon, the life-care planner. Your child’s recovery fund stays untouched. Our spoliation letter goes out within 24 hours of your call.

The case starts now.

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