Yes, a tragic and well-documented incident occurred in July 2011 at Darien Lake Theme Park in New York involving James Hackemer, a 29-year-old Iraq War veteran who had lost both legs in combat. Hackemer was riding the "Ride of Steel," a mega-coaster that utilized a lap-bar restraint system rather than over-the-shoulder harnesses. Because the ride relied on the rider's lower body and thigh tension to keep them secured against the high G-forces and airtime hills, Hackemer was unable to be properly restrained by the device. During one of the coaster's airtime hills, he was ejected from the train and fell to his death. An investigation by the New York State Department of Labor concluded that both the ride operators and the passenger had ignored clearly posted safety requirements stating that riders must have "two natural legs." The incident led to much stricter enforcement of prosthetic and limb-requirement policies across the global amusement park industry. Today, most modern roller coasters have highly specific guidelines for guests with physical disabilities to ensure that the restraint systems can function exactly as engineered for every passenger's unique body shape.