Joe Perry and Steven Tyler got into a shoving match onstage while performing 'Love in an Elevator' in Toronto Tuesday night. First Tyler bumped Perry with his hip, then Perry came back and knocked Tyler into the audience. After making his way back up to the stage, Tyler said, "It ain't gonna happen again!"
Last week at a show at Jones Beach, New York, Tyler hit Perry soundly over the head with his mic stand. This looked like more of an accident. Hear the crack and watch Perry double over in pain and exit the stage starting around :12.WATCH: