The 2016 Rio Olympics had its first viral moment on Monday night. NBC showed a pre-race shot of Michael Phelps and South African swimmer Chad le Clos in the ready room before the semifinals of the men's 200-meter butterfly. Le Clos, who edged Phelps for gold in the event at the 2012 London Olympics, did a prolonged warm-up routine in front of Phelps, who was sitting in the corner with his hood over his head, his headphones on and an angry scowl in le Clos' general direction.