LAS VEGAS—On a raised floor in a ballroom at the Paris Hotel, seven competitors stood silently. These combatants had fought since 9:00am, and nearly $4 million in prize money loomed over all the proceedings. Now some 10 hours later, their final rounds were being accompanied by all the play-by-play and color commentary you’d expect from an episode of American Ninja Warrior. Yet, no one in the competition showed signs of nerves. To observers, this all likely