Some may find this video cruel, but having watched it a few times, the young kid who stars in it, seems to be having a wonderful time and is certainly never hurt.
The video is set in some sort of inflatable obstacle course, and the obstacle in question is some kind of rotating barrier. The barrier seems to rotate in both directions, at differing heights.
Every time the young man gets back on his feet, and into position, and even sometimes before, he seems to get collected by the barrier again and slammed to the floor. In the background, you can hear the spectators really enjoying the spectacle, and I am certain you will also.
https://www.youtube.com/watch?v=sXzN2llZClw