LOL!  Got roped into doing that once when I was a kid.  This was before the 'Any physical activity for children requires protective gear.' phase of society.
I remember the chute opening, and I remember opening my eyes to a mouthful of dirt and the clown helping me up in the middle of the arena.  I have no recollection of what transpired in between.
Used to think I'd never had a concussion in my life.  Talked to a couple people who'd had several and I was like, 'Oh...  I... do know that feeling.'
Good times...
Wiley.