During a bit of stage banter at a New York show last summer, musician Matt Nathanson brought Andrew McMahon onstage to do Tom Petty’s “American Girl,” he tore into the riff for AC/DC’s “You Shook Me All Night Long.” It was only meant to add to what Nathanson was saying between songs in his set, but the crowd picked it up immediately and didn’t let the song end. You can see drummer Chris Lovejoy and guitarist Aaron Tap exchange glances and then McMahon asks Nathanson “What’s happening?” and McMahon responds, “I don’t know!”
