When we were not shooting [The Hangover] we were sleeping, so pretty much every waking moment we spent together. And, you know, Bradley [Cooper], Zach [Galifianakis] and I were acquaintances before the movie started but we became good friends very quickly and spent so much time together that it was just inevitable we were either going to really hate each other or really like each other. Thank god it turned out to be the latter.

Sometimes you just create a joke out of thin air in the editing room. So I'm really glad I've had that experience. It gives me a little more confidence in front of the camera.

God bless him, I mean a lot of times you get non-actors on a set and they get really self-conscious, especially when doing something crazy like singing along with Phil Collins. They get sort of reserved and self-conscious. Mike [Tyson] completely trusted Todd [Phillips] and totally put everything into it.

I lived in New York for 10 years, I loved it, I never second-guessed it. There were definitely times when I thought, "I will never leave this place." And I kind of got into that center-of-the-universe mindset.

I went to Oberlin College, and they don't have a film major, but they do have what's called an individual major, where you can sort of pitch to a committee your own course study, and if they approve it, you have essentially just designed your own major. So Oberlin doesn't have a film major; they do have a film minor... And then my spring semester of my junior year, I went off to NYU film school as a visiting student - they have a program for kids from other schools to come in for a semester.

That's actually a rare thing to be on a set full of people that you admire and make you laugh all the time.

When you're playing a fictional character reacting to the real world, it's incredibly difficult and confusing and kind of messes with your values a bit.