Seeking Justice After a Trampoline Injury in the City of Sunset Valley

“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.”

Those are the words of Kaitlin “Kati” Hill, a mother who watched her three-year-old son, Colton, suffer a broken femur during what was supposed to be a safe “Toddler Time” session at a park. Her warning, shared a quarter of a million times, ends with a sentiment we hear from families in the City of Sunset Valley every single week: “We had no idea.”

If your child was injured at a trampoline park near the City of Sunset Valley, or if you were hurt on a defective backyard trampoline in your own neighborhood, you are likely standing where Kati Hill stood. You are at the bedside in a trauma bay—perhaps at Dell Children’s Medical Center—watching your child deal with a Salter-Harris growth plate fracture or a traumatic brain injury. You are probably replaying the moment you signed that electronic waiver on the iPad kiosk, wondering if you signed away your family’s future.

We are Attorney911. Our firm is led by Ralph Manginello, who brings over 25 years of courtroom experience to every case we take. We are based in Texas, with offices in Houston, Austin, and Beaumont, but our knowledge of trampoline injury law is sought after nationwide. We know the City of Sunset Valley. We know the families on the quiet streets near the Brodie Lane shopping centers, and we know local parents often drive up MoPac or over to Highway 290 to visit facilities like Urban Air or Sky Zone for birthday parties and weekend fun.

We’re here to tell you that what happened to your child wasn’t an accident. It was the predictable output of a business model that prioritizes throughput over protection. From Urban Air’s headquarters in Grapevine to the local parks serving the City of Sunset Valley, the industry operates on a safety floor they designed themselves, and even then, they frequently fall through it.

The Reality of Trampoline Injuries in the City of Sunset Valley

The City of Sunset Valley is a uniquely family-centric community. Our backyards are often equipped with Jumpking, Skywalker, or premium Springfree trampolines. Our weekends are filled with trips to multi-attraction adventure parks. But the statistics we track at Attorney911 tell a darker story than the bright marketing brochures suggest.

Nationally, over 300,000 trampoline-related emergency room visits occur every year. In a metro area as dense as ours, encompassing the City of Sunset Valley and the greater Austin region, thousands of these injuries happen right here. According to a 2024 study published in the journal Pediatrics by Teague et al., foam pit injury rates have reached 1.91 per 1,000 jumper-hours, while high-performance jumping zones see rates as high as 2.11 per 1,000.

As a senior attorney at our firm, I have seen the medical records that these numbers represent. I have litigated against Fortune 500 companies and institutional defendants. I’ve seen the same pathology in these cases that we are currently litigating in our active $10 million lawsuit against the University of Houston involving rhabdomyolysis and acute kidney failure. Whether the muscle breakdown comes from hazing or from a child jumping for 90 minutes straight in a hot park near the City of Sunset Valley without a hydration break, the damage is real, and the accountability lies with the people in charge.

What Happened: The Physics of the Double-Bounce

The most common mechanism of injury we see at parks near the City of Sunset Valley is the “double-bounce.” It happens in two seconds. An 80-pound child pushes off a trampoline bed just as a 200-pound adult lands on the same mat. Because of the way trampoline beds store and transfer energy, that child doesn’t just jump; they are launched.

Physics doesn’t negotiate. When that energy transfers, it can multiply the child’s launch force by up to 4x. The child is thrown at velocities their developing skeletal system cannot absorb. This is precisely why ASTM F2970—the industry’s own safety standard—requires parks to enforce age and weight separation. When you walk into an Urban Air or an Altitude and see a teenager on their phone while adults and toddlers share the same court, you are looking at a park choosing to ignore the rules of physics to save on labor costs.

In the City of Sunset Valley, your child deserves an attorney who can quote ASTM F2970’s attendant-supervision provisions from memory. Most personal injury firms handle a trampoline case like a standard slip-and-fall. We don’t. We treat it as a corporate accountability case.

Who is Responsible: Corporate Archeology in the City of Sunset Valley

When we represent a family in the City of Sunset Valley, we don’t just sue the local LLC listed on the front door. We perform what we call “corporate archeology.”

Trampoline parks are layered like an onion to shield the money from the victims. There is the Operator LLC, which is usually undercapitalized. Above them is the Franchisee, often a multi-unit owner. Above them is the Franchisor—Sky Zone Franchising LLC or Urban Air Franchise Holdings. And at the top sits the Corporate Parent and their Private Equity Sponsor. For Sky Zone, DEFY, and Rockin’ Jump, that parent is Sky Zone, Inc. (formerly CircusTrix LLC), backed by Palladium Equity Partners. For Urban Air, it is Unleashed Brands, backed by Seidler Equity Partners.

We go upstream. We know the franchisor’s additional-insured provisions. We know that the primary $1 million policy the adjuster mentions is just the floor. Above that sits an umbrella, and above that an excess layer. We’ve gone head-to-head with BP after the Texas City refinery explosion; the private equity sponsors behind these jump parks don’t intimidate us.

The Waiver: Why It Doesn’t End Your Case in Texas

The most common question we get from parents in the City of Sunset Valley is: “But I signed a waiver on the iPad, does that mean I have no case?”

The answer in Texas is a loud and firm NO.

While Texas law is generally more favorable to businesses than states like New York or California, our courts have established significant “attack vectors” against trampoline waivers:

1. The Munoz Rule: In Texas, under Munoz v. II Jaz Inc., a parent generally cannot sign away a minor child’s right to sue for personal injuries. Your signature might bar your own claims, but your child’s right to recovery belongs to them, and Texas law protects it.
2. Gross Negligence Carve-Out: In the City of Sunset Valley and across Texas, no waiver can release a defendant from “gross negligence.” Under the Moriel standard, if a park was aware of an extreme risk—like a torn mat or inadequate staffing—and disregarded it, the waiver is void.
3. The Dresser Fair Notice Doctrine: A Texas waiver must be conspicuous. It must use the word “negligence” explicitly. If it was buried in 20 screens of text at a busy kiosk, it likely fails the test.
4. Bilingual Challenges: Under the Delfingen doctrine, if your family’s primary language is Spanish and the park only provided an English waiver without explanation, the contract may have never been formed correctly. Lupe Peña at our firm speaks Spanish natively and handles these cases directly.

The 2025 jurisdictional split is active. While the Texas Supreme Court recently upheld a delegation clause in Cerna v. Pearland Urban Air, we know the specific counters. We challenge the delegation clause itself. We show that a child receiving a wristband isn’t “direct benefit” enough to force them into a private arbitration room.

Catastrophic Injuries We See in Travis County

Our firm handles the injuries that change lives. We don’t just see “broken bones.” We see:

• Salter-Harris Fractures: A fracture through the growth plate that can cause a child’s limb to grow crooked or stop growing entirely. A six-year-old in the City of Sunset Valley who suffers this injury may not see the full impact until they are fourteen.
• SCIWORA: Spinal Cord Injury Without Radiographic Abnormality. This is a terrifying pediatric phenomenon where a child’s spine looks normal on a MRI but the cord is permanently damaged because the ligaments are more flexible than the cord.
• Exertional Rhabdomyolysis: We are specifically equipped for these cases. If your child had brown, “cola-colored” urine after a visit to a park, their muscles have suffered catastrophic breakdown. This leads to acute kidney failure. Because of our current $10 million UH rhabdo litigation, we have the medical experts ready to testify today.
• Vertebral Artery Dissection: As seen in the viral Elle Yona case, a backflip can tear the artery in the neck, causing a spinal cord stroke. If your child’s neck pain was misdiagnosed as a “panic attack,” you need to call us immediately.

482-Hour Evidence Protocol: The Clock is Ticking

In the City of Sunset Valley, the evidence of what happened to your child is already beginning to vanish. Trampoline park DVRs are notoriously set to overwrite every 7 to 30 days. The incident report usually gets “revised” by a risk manager within 48 hours.

Our firm doesn’t wait. When you retain us, our spoliation letter goes out within 24 hours. We demand the DVR hard drive, the kiosk audit trails, and the attendant shift logs. We know that by day 10, the Saturday your child was hurt is often gone from the system. If they tell us the video is “unavailable,” we send in forensic examiners to find out who deleted it and why.

Why Choose Attorney911 for Your City of Sunset Valley Case?

We believe we offer the most complete trampoline injury practice in Texas. Our moat is built on four pillars:

1. Insider Knowledge: Our associate attorney, Lupe Peña, used to sit on the other side of the table. He defended the insurance companies and drafted the same waiver language these parks use. He knows where the holes are.
2. Medical Depth: Our $10M rhabdomyolysis case gives us a medical-litigation bridge that most generalist firms can’t match. We understand the biology as well as the law.
3. Proximity and Power: We have three Texas offices, but we’ve litigated against the massive corporations that hire the park’s defense teams. A boutique City of Sunset Valley firm might handle a car wreck; we handle the PE-backed conglomerates that own the chains.
4. No Risk to You: We work on a contingency fee. That means 33.33% pre-trial or 40% if we go to court. We advance all costs—the biomechanical engineers, the pediatric surgeons, the life-care planners. You pay nothing unless we win.

Frequently Asked Questions

Can I sue if I signed the waiver at a park in the City of Sunset Valley?
Yes. In Texas, waivers are not absolute shields. Between the Munoz minor-protection rule and the Dresser conspicuousness requirement, most trampoline waivers are full of holes. If the park was grossly negligent—such as having an undertrained teenager watching 50 kids—the waiver fails entirely.

How much is my child’s trampoline injury case worth?
Case values are based on the life-care plan. A Salter-Harris fracture with growth arrest can anchor in the $500k to $2.5M range. A catastrophic spinal cord injury can reach $10M to $25M+ because it must cover 70 years of medical care, home modifications, and lost earnings. We look at the $11.485M Cosmic Jump verdict in Harris County as the benchmark for Texas juries holding these parks accountable.

How long do I have to file a claim in Travis County?
In Texas, the statute of limitations is 2 years. For minors, it is usually tolled until their 18th birthday, giving them until age 20. However, waiting is a mistake. The evidence—surveillance video especially—is often destroyed within 30 days. We file fast to freeze the facts.

What if the park’s surveillance video is missing?
When a park’s video “glitches” at the precise moment of injury, we pursue an adverse inference instruction. A Georgia jury recently awarded $3.5M in a case where four cameras all glitched simultaneously. We treat “missing video” as a sign of a cover-up, not a technical error.

What is the “Don’t Call 911” protocol?
Multiple parents have reported that parks near the City of Sunset Valley and across Texas have internal instructions to discourage calling 911. They want you to leave the parking lot quietly so the video can overwrite and the witnesses scatter. We treat the refusal to call 911 as evidence of gross negligence.

Take Action for Your Family Today

What happened to your child at the trampoline park wasn’t an accident—it was the predictable output of a system designed by private equity firms to maximize profit. The AAP has been warning about these hazards since 1999. The industry wrote ASTM F2970 as a safety floor, and then most parks chose to jump beneath it.

Your child’s case will be decided by what we preserve this week. By day 10, the Saturday of the injury is gone from the DVR. By day 30, the “revised” incident report is the only one the insurance company will see.

We represent families in the City of Sunset Valley with the same tenacity we brought to the BP Texas City litigation and the same medical depth we bring to our $10M UH rhabdo case.

Call 1-888-ATTY-911. We answer 24/7. Hablamos Español. No fee unless we win. Our spoliation letter is ready to go out within 24 hours of your call. Don’t let a piece of paper the park handed you at an iPad kiosk stop you from protecting your child’s future.

The case starts today.