Funny clip from David Letterman Monday night. If you’re one of the thousands following what you think is Jonah Hill on Twitter, you’ve been scammed by a hacker. Fake celebrity Twitters are not uncommon but this idiot has even caused a feud with “Iron Man” director Jon Favreau.

“I have never been on the website Twitter nor will I ever be on the website Twitter,” Jonah told Dave. “Apparently this kid has been talking trash to Jon Favreau,”

Jonah said that since he wanted to work with JF one day he had no choice but to call the director and apologize.