This is one of the weirdest videos I’ve seen. According to b3ta, this condition was caused by the guy’s mom taking thalidomide when she was pregant:
In the 1960s, mum-ladies didn’t want the pain of morning sickness and turned to super-science to give them magic-drugs. Sadly it had the side effect of producing children with less limbs than the normally requisite four. Doesn’t stop them break-dancing though. See him go. Wheee!
It’s amazing that he can do what he does, but it’s just weird to watch.