Getting decapitated by a water slide is exceptional. The only other cases I can find about amusement park decapitations involve people being struck by roller coasters after they either entered a restricted area or were thrown out of a roller coaster. This case might be the only one of someone being decapitated while they stayed in the ride vehicle. Keep in mind that deaths at amusement parks are very rare, typically only two or three per year in the United States. And that's among all amusement parks. Most of those deaths are either due to pre-existing medical conditions or safety devices failing and people being ejected from the ride vehicle.
This case is neither. The kid died because the tallest water slide in the world was designed through trial and error by a guy with no experience in physics or engineering.
This case is neither. The kid died because the tallest water slide in the world was designed through trial and error by a guy with no experience in physics or engineering.