Robert Pattinson slammed a Los Angeles comic earlier this week after the stand-up star made jokes about the January 2008 death of actor Heath Ledger.

The Twilight heartthrob was in the audience at The Improv Club in Hollywood when a stand-up comedian performed an “impression” of Heath Ledger by collapsing on the floor and convulsing.

“Robert and his friend went nuts yelling at him,” a witness told Us Weekly. “[Robert screamed] f**k you! You suck!”

“The comic didn’t know who it was, but I’m sure he found out later!” the spywitness told Us.