Mac Miller is seriously a champ!
While performing in Phoenix recently as a part of his "Space Migration" tour, Miller randomly COLLAPSES ON STAGE during the middle of the song. This wasn't part of the act.
While it's unknown what caused him to collapse, what happens next? He gets RIGHT BACK UP and finishes the song! Like a boss.
The video below shows what happened. Fast forward to around 2 minutes into it and you'll see the collapse.