Van Halen front man David Lee Roth confronted a beer-throwing fan at their concert August 27 at the Susquehanna Bank Center in Camden, New Jersey.

As the band began “Dirty Movies,” Roth instructed the band to stop playing after a beer had been launched onto the stage. And then Roth gave out his most damaging insult he could think of.

“Somebody just threw a beer up here. In a younger day, I would’ve promised I would’ve slept with his girlfriend. At this point in my career, the roughest, most f***ed insult I could probably make to this guy is that I probably already have slept with his wife.”

Roth finished his insult with a few more words and gestures. Van Halen are currently on tour on the east coast and will wrap their tour on October 4 at the Hollywood Bowl.

For the full incident, check out the video below.