The responses are hysterical. You guys have all picked individuals who can't even stand on their hands, not only are these not the greatest athletes of all time, they lack even basic physical mastery.
This guy is the 2008 olympic all around gold medalist:
Yang Wei, if he isn't the greatest athlete of all time it is probably Kohei Uchimura who won the silver in 2008 and was this year's world champ: