Yeah the design of the slide is ****ed up. Once the kid had come loose he didn't stand a chance. And velcro belts? I mean, even if we forget the fact that this is a water slide and water reduces the stickiness of velcro this is a slide with a 168ft drop with the dinghy's travelling at 65mph. What a complete disgrace to allow this slide to be built.
The first time I went to SofFrance, back in the early 1980's, we went to a water amusement park in Agde. It has since expanded, but back then it was very much to do with all kinds of water slides. Me, being scared of anything over a half-decent height, I decided to test myself. So I climbed the fairly closed stairs to the top of this very high, very yellow, water slide. It was one of those where you lay on a thin foam mat to save any possible sliding burns, with water cascading over the fall. It had two very steep sections which eventually caught you, before slipping steeper again. When you leapt away it took you down the first few feet as if you were in a ordinary park slide, then it completely dropped away but caught you, then swept you forward before dropping completely away again. This meant for a goodly while you were in mid-air with nothing around you. Eventually, the slide caught you again and you got to the bottom sliding into deeper water.
I have to say that, first time, there was a mixture of huge fright and thrill, but I thought it would be good for me to do it again, as I knew what was coming. Actually, it was even worse. The second time I threw myself off and when the slide disappeared below me it
really disappeared below me. Suddenly I was a bird that had forgotten how to fly or a man who'd forgotten to pack a parachute. Looking back, it was completely safe, but at the time it was an horrific feeling. I wasn't cured.
These days I think a number of these thrill designs get far too close to the limit of what could be perceived as dangerous [the thrill] and what is actually dangerous should things go even slightly amiss. IIRC, the slide I went on actually had a low wind speed limit, so that people couldn't possibly be swept off the slide's vertical course. A sensible caution.