Paul Giamatti Hangover 2 was intense!

Paul Giamatti says things were “very intense” on the set of upcoming movieThe Hangover: Part II.

The actor who plays a “creepy guy” in the film sequel admits he didn’t have much fun.

“Not a lot of laughs,” he said.

Referring to his costars Bradley Cooper and Zach Galifianakis, Giamatti added, “Those guys aren’t cutting up all the time.

“I probably was d—ing around more than they were. … Zach’s not like I mean he’s funny, but he’s not f—ing around. It’s interesting, actually.”

Paul recently admitted he hates watching himself onscreen

“I’m not gonna get any better if I don’t,” he explained. “And no one else is going to pick me apart well, they will but I want to learn so I have to pick myself apart. I think I do it in a more useful way than I used to. It used to be dismissive. I couldn’t even watch.”