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.

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.

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.

[Mike Tyson] was fantastic. Well, here's the cool thing about Tyson. It turns out he's a huge fan of Old School, which was one of Todd Phillips' earlier movies. So he got to the set and he already liked Todd and he trusted Todd.

I'm the worst in The Office. It's a problem. They've had to shut down the set for like 30 minutes because of me.

Whenever I've messed around with radio-controlled things, there's always been a part of me that's thought, I wonder if there might actually be a little guy piloting these vehicles.

I didn't mention the tooth thing to anyone until it became clear that...we started to discuss just taking it out of the movie [The Hangover] because we couldn't find anything that worked and they couldn't afford to do a full like digital effect. So that's when I called my dentist and it worked out.