You can see his blades build up momentum as he goes. Its a totally different thing going on then real legs. He should not be competing IMO. Its a good story but if he was fast enough to win, he would not be allowed its that simple.
How about someone born without arms using robot arms in the shooting competition. Ones that don't waver etc etc, oh and he has a bionic eye also lol. Just opens up a can of worms IMO.