A while ago I went to Terme 3000 in Slovenia, they had a looped style waterpark ride. Just as crazy as is looks, I guess the tilt angle prevents major injuries? Because that slide has been open for a long time. It took no effort to clear the loop as well.
Edit: For those curious, it’s a pod-style release you can see on the image, the floor disappears under your feet. The green one next to it is one of the steepest in Europe IIRC.
Makes sense, it’s more of a bobsled feeling than a loop feeling.