As much as you do get beat-up doing even small action sequences, it's incredibly fun.

The Daily Show was an incredible training ground for that kind of thing. It was all about discipline and generating material constantly.

There are currently more political parties in Iraq than unbombed buildings to hold them.

Improvisation is about finding the best joke or the silliest way to get something across. Improvising conflict is always fun because you can just go for it.

One of the biggest breaks we had actually, one of the biggest, the hardest I laughed on the movie [The Hangover] was the baby was just doing ridiculous things and making hilarious faces. But I'm sitting there and I'm supposed to be having this exchange with Zach [ Galifianakis] and the baby is like staring at me with these huge eyes and acting, and just making the most cerebral faces, and I could not keep it together.

I mean they [ Bradley Cooper, Zach Galifianakis] are both just really good guys and also they're both extremely funny in very unique ways. We made each other laugh an awful lot, and that goes a long way. And we also went through some hard times. I mean it was hard to make this movie [The Hangover].

Vulnerability is huge. I love to see that in characters. It's something I feel like a lot of my comedic heroes have always done.