This unique performance occurred during a timeout at a Phoenix Suns game. Performer Nick Corrales apparently overshot his jump, and ended up going THROUGH the hoop by accident! Fortunately, he came out of the stunt with only a bruised nose and a bump on the head (since he wasn't crushed by the large man directly behind him!)
Start watching at the 1:44 mark. It's amazing that this dude didn't get seriously injured:
Of course, if you want to see it done wrong...