Jesus, that's bad, bet there were a few sore balls that day!
I remember as a kid I was tearing around the local off road area that actually used to be a quarry/mine with a mate on the back of my TS 100 and I turned a bend and went straight into a ditch.
My balls hit the tank then my mate slammed into my back slamming my already bruised balls back into the tank!
Balls........