Every Summer Olympics features a handful of superhumans the likes of Usain Bolt, Gabby Douglas and Michael Phelps. Rio will be no exception. With shows of supreme physical strength and grace, the standouts in the 2016 Games will sprint, flip and glide their way through a gauntlet of grueling events. They will captivate the crowds, smash records and, in all likelihood, leave Brazil with an impressive haul of gold.