One bounce. One bad landing. One broken neck. That is all it takes at a trampoline park.
At the Urban Air and Altitude parks serving families in Renner, a child can go from a birthday party celebration to a trauma bay at Children’s Medical Center Plano in under thirty seconds. It happens because a parent signed a waiver at a kiosk twenty minutes earlier, believing the marketing that these facilities are “safe family fun.” We know the truth. For over twenty-five years, Ralph Manginello and our team at Attorney911 have stood with families across Dallas County when corporate negligence shatters a child’s future.
We have seen what happens when the Saturday afternoon rush at a park near Renner collides with a business model that cuts staff to protect margins. We represent families who have heard the sound of a tibia snapping over the loud music of a “Glow Night.” We represent the parents sitting at a hospital bedside tonight, wondering if the piece of paper they signed ended their right to hold the park accountable.
It didn’t. That waiver isn’t a wall; it’s noise. In Renner and across Texas, we use a specific, aggressive litigation architecture to pierce those waivers and the multi-layered corporate shells that hide the big insurance towers. Whether your child was injured by a double-bounce on a crowded court, a harness failure on a climbing wall, or a hidden defect in a backyard Jumpking or Skywalker trampoline, we are built for this fight.
The Reality of Trampoline Injuries in Renner
Renner families live in one of the most saturated trampoline park markets in the world. Between the Urban Air headquarters in Bedford and the Altitude headquarters in Fort Worth, our backyard is the proving ground for these national chains. On any given weekend, thousands of children from Renner, Richardson, and North Dallas are airborne. And every one of them is an insurance policy with a waiver attached.
Nationally, trampolines send over 300,000 Americans to the emergency room every year. In a metro the size of Dallas, that share is measured in thousands. But the number that should haunt every parent in Renner was published in the journal Pediatrics in January 2024. Teague et al. tracked over 13,000 injuries and found that foam-pit injury rates are as high as 1.91 per 1,000 jumpers. If a park in our area sees 500 kids on a Saturday, physics says someone is likely leaving with a significant injury.
What happened to your child wasn’t a “freak accident.” It was the predictable result of a system. The American Academy of Pediatrics (AAP) has been warning parents that trampolines don’t belong at home since 1999. They reaffirmed that warning in 2012 and 2019. The industry knew the risks, so they wrote their own rules—ASTM F2970. When a park serving Renner violates its own industry-written standards for attendant ratios or age separation, that isn’t a mistake. It is a business decision.
Why a Trampoline Injury is Never an “Accident”
We operate from a single master premise: a trampoline injury is a business decision that went wrong. The “accident” happened long before your child set foot on the trampoline. It happened when a corporate executive approved a staffing cut that left one seventeen-year-old monitor watching sixty jumpers. It happened when an operations manager in a facility near Renner accepted an inspection log showing a compacted foam pit but didn’t close the attraction.
We don’t argue negligence; we establish it using a seven-stage authority ladder. We start with the fact that the AAP has warned about these injuries for a quarter-century. We move to the specific ASTM F2970 provision the park violated. We apply the physics of double-bounce energy transfer—where a 200-pound adult landing can multiply a child’s launch force by 4x. Finally, we expose the corporate decision to accept that risk for profit.
Our firm’s founder, Ralph Manginello, learned this accountability model by litigating against multinational corporations like BP after the Texas City refinery explosion. We don’t care how many lawyers the parent companies behind Sky Zone, Inc. or Unleashed Brands hire. We have fought bigger corporations, and we know their playbook. We also have a former insurance defense attorney, Lupe Peña, on our team. He used to write the very waiver language these parks use to try and stop you. He knows exactly where the holes are.
What Happened: The Mechanics of Park Negligence
If your child was injured at a facility in or around Renner, the mechanism likely has a name documented in our research moat. We don’t just say they “fell.” We use biomechanical engineering and medical specificity to describe what actually occurred.
The Double-Bounce Catapult (ASTM F2970 Violation)
This is the signature injury of the modern trampoline park. When a larger jumper lands while a smaller child is pushing off the same bed, the energy stored in the mat is transferred into the child. The child isn’t jumping; they are being thrown. This violates the ASTM F2970 requirement for age and weight separation. If a park in Renner allowed your six-year-old on the same court as a teenager, they violated the standard of care.
Foam Pit Submerged-Entrapment and Compression
Foam pits look soft, but they are often the most dangerous attraction in the building. When the open-cell polyurethane cubes aren’t rotated or replaced according to the F2970 schedule, they compact. A jumper entering the pit head-first can wedge between cubes, torquing the neck and striking the hard floor beneath. This is how we see SCIWORA (Spinal Cord Injury Without Radiographic Abnormality) in pediatric patients—where the spinal cord is stretched or crushed even when the X-ray looks “normal.”
Harness and Fall-Protection Failure
Urban Air and Altitude parks near Renner have pivoted toward “Adventure Hubs,” adding climbing walls and the “Sky Rider” zipline. The Lakhani case in Sugar Land serves as a warning for all Texas families: a 14-year-old fell thirty feet because an attendant failed to attach the fall-protection equipment. When these secondary attractions fail, it is almost always a training failure—a direct breach of the duty to provide reasonable supervision.
Exertional Rhabdomyolysis and the “Jump All Day” Pass
Renner families often buy “all-day” or “two-hour” passes. In heated indoor facilities with inadequate water access, a child jumping continuously for ninety minutes is at risk for rhabdomyolysis. This is a catastrophic muscle breakdown that spills myoglobin into the blood, leading to acute kidney failure. We are currently litigating a $10 million lawsuit against the University of Houston involving this exact pathology. We know the myoglobin cascade, we know the Creatine Kinase (CK) markers, and we know how to hold institutional defendants accountable for this specific medical emergency.
The Waiver: Why Texas Families Still Have a Case
The most common thing we hear from parents in Renner is: “I signed the waiver at the kiosk, so I probably don’t have a case.” That is exactly what the park’s adjuster wants you to believe. But under Texas law, that piece of paper has limited power.
First, under the landmark case Munoz v. II Jaz Inc., Texas courts have held that a parent’s signature cannot waive a minor child’s personal injury claim. Your signature might affect your own derivative claims, but your child’s right to be whole survives.
Second, the Dresser Industries v. Page Petroleum “fair notice” doctrine requires that any release of negligence be “conspicuous.” If the park buried the release in a twenty-screen iPad click-through with small font and no explanation, it fails the Texas test.
Third, no waiver in Texas protects against gross negligence. The Cosmic Jump verdict in Harris County—over $11 million—proved that when a park knows about a hazard (like a torn mat or a staffing gap) and ignores it, the waiver is void. We recently watched the Texas Supreme Court’s 2025 ruling in Cerna v. Pearland Urban Air, which enforced a delegation clause. This means the fight often moves to arbitration, but it does not end. As the $15.6 million award in the Collins v. Urban Air arbitration proved, a skilled advocate can win the same life-changing damages in an arbitration room as they can in a courtroom.
Catastrophic Injuries: The Pediatric Life-Care Plan
When a child in Renner is severely injured, the medical bills you see today are only the beginning. A “broken leg” at age eight is rarely just a broken leg. If the fracture line extends through the physis, it is a Salter-Harris growth plate injury. This can lead to a limb-length discrepancy that doesn’t fully manifest until age fourteen.
We don’t settle based on the ER bill from the night of the accident. We build a Pediatric Life-Care Plan. We retain a team of experts—pediatric orthopedic surgeons, neurologists, and life-care planners—to forecast the next seventy years of your child’s needs. We account for:
- Future corrective osteotomies to repair growth damage.
- Lifetime special education and cognitive accommodations for TBI victims.
- The present value of lost earning capacity over an entire working life.
- Home and vehicle modifications for spinal cord injury patients.
Our firm advances all these costs. You pay nothing unless we win. We treat your family like our own because, as our client Chad Harris said, “You are NOT just some client… You are FAMILY to them.” We represent the parent at the bedside, and we ensure the settlement reflects the true lifetime cost of the park’s negligence.
The 48-Hour Evidence Preservation Protocol
The clock in your case started the second your child hit the mat. While you were in the ambulance, the park’s risk management team was already working. To win a trampoline injury case in Renner, we have to act faster than the park’s DVR overwrite cycle.
Most trampoline park surveillance systems in North Dallas overwrite their footage every 7 to 30 days. If you wait until a month after the injury to call us, the video of the attendant on his phone is gone forever. Incident reports on the park’s computer system can be “revised” with metadata edits that we can subpoena—but only if we send our spoliation letter immediately.
Within 24 hours of your retention, we send a certified legal demand to the park, the franchisor (like Urban Air or Sky Zone), and the insurance carrier. We demand the preservation of:
- Multi-angle surveillance footage including the 48 hours before and after the incident.
- The original incident report and all computer version history.
- The attendant’s time-clock records and training files.
- The daily pre-opening inspection logs for the specific court involved.
- The waiver kiosk database logs, including IP addresses and timestamps.
By day 10, while the park is hoping you’ve moved on, your case is already forensically secure. We use advanced tools like Cellebrite for mobile data and FTK Imager for DVR extraction to ensure the evidence we present to a jury is unassailable.
Liable Parties: Piercing the 5-Layer Stack
When we sue a park near Renner, we don’t just name the local LLC. We perform corporate archeology to find the money. The operator LLC is often undercapitalized by design, carrying a small $1 million policy. We go upstream.
We identify the franchisee, then the franchisor (Sky Zone Franchising LLC or Urban Air Franchise Holdings), then the corporate parent, and finally the private equity sponsor. Palladium Equity Partners (for Sky Zone/DEFY) and Seidler Equity Partners (for Urban Air) approve the budget decisions that affect safety in Renner. We name every layer because Through-Line #13 is our guiding principle: every insurance layer exists and gets discovered.
We also identify third-party targets many firms miss. If the climbing wall harness failed at an Altitude park, Ropes Courses, Inc. is a product liability defendant. If the injuries occurred on an inflatable “zip coaster,” we access the Texas Department of Insurance Class B registration records and hold the manufacturer accountable under strict liability. We even look at the insurance applications. If the park lied on its application about staff training or prior incidents, it creates bad-faith leverage that forces a settlement.
Frequently Asked Questions for Renner Parents
Can I sue if I signed the waiver at an Urban Air or Sky Zone in Renner?
Yes. As we discussed, Texas law is very protective of children’s rights. Under Munoz, the parent’s signature generally cannot bar the minor’s own claim. Furthermore, if the park was grossly negligent—meaning they knew of a risk and ignored it—the waiver is unenforceable for everyone.
How long do I have to file a case in Dallas County?
The Texas statute of limitations is two years from the date of injury. For a minor, that clock is “tolled” until they turn eighteen, but waiting that long is a catastrophe for evidence. The surveillance video will be gone in weeks. The attendants will have quit. We recommend filing before the first anniversary of the injury.
What if the park says it was my child’s fault?
In Texas, we follow a modified 51% bar rule. The park will always blame the child jumping “wildly” or the parent for “not supervising.” However, children under seven are generally presumed incapable of negligence. For older children, we use biomechanical engineers to prove that the park’s failure to enforce safety rules was the “proximate cause”—the main reason—for the injury, regardless of what the child was doing.
Does it cost anything to hire Attorney911?
No. We work on a strictly contingency-fee basis. We advance every dollar for the experts, the filing fees, and the private investigators. If we don’t recover money for your family, you owe us nothing. Your child’s recovery fund stays intact.
How much is my child’s case worth?
Every case is different, but we anchor our demands in national and local data. The Cosmic Jump verdict shows a $11.4 million ceiling for TBI. Collins shows $15.6 million for paralysis. Even for a serious growth-plate fracture without permanent disability, settlements often reach the $300,000 to $1 million range when the future medical needs are properly documented in a life-care plan.
Why Choose Attorney911 for Your Renner Case?
Most personal injury firms handle a trampoline case like a simple slip-and-fall. They send a demand letter, accept the first low-ball offer, and pay the medical liens. We don’t. We built our entire practice architecture around these complex corporate cases.
We understand the corporate consolidation that happened in 2023. We know that Sky Zone, Inc. now parents DEFY and Rockin’ Jump under the same Palladium Equity umbrella. We know that Urban Air’s parent, Unleashed Brands, was acquired amid lawsuits by Seidler Equity. We use this “FRE 404(b)” pattern evidence to show that what happened to your kid in Renner has happened to dozens of other kids in other states—proving the chain knew the attraction was dangerous and did nothing.
Our team is ready to talk to you tonight. Hablamos Español. Nuestra abogada asociada Lupe Peña le hablará directamente, sin intérpretes. Ella pasó años defendiendo estas mismas compañías; ahora usa su manual de jugadas para ganar para familias como la suya.
The Case Starts Today
What happened to your child at the park wasn’t an accident. The AAP has been warning about this since 1999. The industry standard was written by the parks themselves and then violated. The waiver was drafted to scare you, and the surveillance is engineered to disappear.
Your child’s case is decided by what gets preserved this week. If you wait until next month, the video is gone. The incident report is “finalized.” The witness is at a new job. We file fast. We investigate deeper. We pierce the shields they built to protect their profit.
Call 1-888-ATTY-911 now. Hablamos Español. Our firm is based in Texas, licensed in federal court, and ready to handle your case in Renner or anywhere in the country. We advance every expense. You stay at the bedside. We handle the fight.
1-888-ATTY-911. No fee unless we win.
Una Nota para Familias Hispanohablantes en Renner
Si prefiere hablar en español, llame directamente a 1-888-ATTY-911. Lupe Peña es nuestra abogada bilingüe y antes de unirse al bufete, ella defendía a estas mismas compañías de seguros. Ella sabe que el personal de los parques a menudo presiona a las familias para que firmen waivers en inglés que no entienden. Bajo la doctrina de Delfingen US-Texas v. Valenzuela, podemos impugnar esos documentos si no se proporcionó una traducción adecuada. Su estatus migratorio no le quita el derecho de buscar justicia para su hijo. El 911 es seguro. El hospital es seguro. Y nuestra oficina es el lugar más seguro para proteger el futuro de su familia. Llame hoy mismo.
frequently asked questions — localized for Renner
What if the injury happened at the Urban Air in North Dallas or the Altitude in Richardson?
These are major locations for Renner residents. We have handled cases against both brands. Because their corporate headquarters are in Bedford and Fort Worth, we have a “home field” advantage in discovery. We know their local managers, their local staffing patterns, and the Dallas County jury pool.
Does insurance cover backyard trampoline injuries in Renner?
Many homeowners’ policies in master-planned communities around Renner explicitly exclude trampolines. However, we look at the umbrella policy and frequently find a path through a product liability claim against the manufacturer (like Jumpking or ACON) or the retailer (like Walmart or Amazon).
What is the “Don’t Call 911” protocol?
We have seen reports—like those at Urban Air Southlake—where management allegedly instructs teenagers NOT to call 911 to avoid negative attention. If this happened to your child in Renner, it is evidence of gross negligence. Call us immediately so we can obtain the 911 dispatch CAD records to prove the delay.
More Resources for Renner Families
- Children’s Medical Center Plano: The primary Level 1 pediatric trauma center for North Dallas and Renner.
- Texas Department of Insurance: Where we pull Class B inflatable inspection records for attractions like the “Sky Rider.”
- ASTM F2970-22: The standard we will use to prove the park near Renner was negligent.
Call 1-888-ATTY-911 today for a free consultation. Hablamos Español.
