Bodybuilding stage fails. Bodybuilders fall down on stage. Collapses on stage. Dallas McCarver, a favorite going into the 2017 Arnold Classic Australia, collapsed on stage during pre-judging. Phil Heath got a crazy muscle cramp when he was guest posing on stage, he fell in pain and could not stand up. Phil explains that fans were doubtful if this was really a part of his routine, which is was certainly not. Bodybuilders stepping on stage have extremely limited of water in their system making them vulnerable to muscle cramps caused by dehydration.