At least it happened on the final note of his encore song - ironically enough, "Alcohol."
He sure handled it like a pro - Tyra Banks would be so pround.
He did go to a local hospital via ambulance after leaving the stage.
He's pretty badly bruised, but doing OK. He posted this picture on his Twitter page.
He also tweeted, "really did think I broke a rib or something." (tests showed no fractures even) Yesterday he tweeted, "Man am I sore today. You guys should see the brusie."