The frontman halted the gig in Broomfield and urged security to escort the rowdy fan out of the venue.
He raged, "Hang on, hang on, hang on. Hey, hey homie. You don't hit a woman. You just pushed a woman out of the way to get in a fight, you d**k!
"Get him the hell out of here."
In footage of the moment, shot by another fan and uploaded to YouTube by 3 Doors Down guitarist Chris Henderson, fans can be heard cheering Arnold's remarks and booing the unruly fan.