Never mind all the crazy dips-n-twists and throwing you in a pool at the end, those chain things have to be hell on the tailbone (assuming this is a true water slide and it's just your butt on a mat riding through it).
Wouldn't there have been several hundred places where you would have been launched off the slide and into the air? Between this and the hot ice cube I am having a real "physics hurts my head" week.