Dance with Crutches?

I sorta came across this on Youtube and I was deeply captivated (make sure you watch till it finishes):A long "Wooow"? I initially thought this is just so cool and the guy must be a genius. But I had one thing to ask, as most of the ppl would, that "Does he really need the crutches?" Then I read a little more about him at his website. Then I was stunned.Bill Shannon, aka the "Crutch Master", has