I remember watching that TV show. It was pretty easy to see that at least one of the executives was super gung ho about building the world's tallest water slide. I remember on the show the first time they did a test run of it, they put in weighted dummies and they went flying hundreds of feet into the air, plunging to their inevitable death. The fix was to add a net so they couldn't get ejected off the tube.
Now, to his credit, when the slide was reaching its final stages, right before opening, the executive that pushed the envelope so much was willing to be a test dummy for the ride.
I'm going to have to find that show again so I can watch it.
And to your post, my son loves water slides, but I won't get on them anymore. I'm a big guy, gravity isn't kind to me. One too many times I damn near went off the side of the slide. I did one of those toboggan races at Disney one time and I swear I hit that second dip and I went airborne a good two feet before landing. And stopping at the bottom was a bench too. Thank God that runway extended a good 50 feet or so because it took every inch of it to slow my big ass down.