I was just fooling around with the piano and Todd [Phillips] was like, 'Hey there's a great spot in the movie [The Hangover] where we need a little bit of a breath in the narrative. You should write a song and stick it in there.' And I was like, 'Well, what should the song be about?' And he said, 'The tiger.' 'Oh, okay.' So I went off and I wrote this song. I came back and Todd and I tinkered with it a little more and then we shot it right then. It all happened in a day.

It's a very collaborative environment [making The Office]. We always do takes of how it's scripted, but then we also mix it up a lot too. And it's kind of a crapshoot, you never know which one... I mean a lot of time improvisation doesn't go anywhere and it's not good at all but, so what was written is often times better.

[I read news] because no one's going to tell me what they really think of something.

Todd [Phillips] doesn't care. That's part of his genius as a director, he will say anything to anybody.

As an actor, you can really play the intensity and gravity and seriousness of the moment, and just rely on the circumstances being funny. The joke is kind of the situation you're in, or the way you're reacting to something, as opposed to the characters just saying something witty.

I mean the fun part about when Andy Bernard sings on The Office is he usually embellishes the songs in fun, stupid ways. That's just something that I do in life, like in the shower or whatever. So a lot of that stuff is pretty spontaneous.

Almost everything is in the movie [The Hangover]. I think the fun little Easter eggs on the DVD will be sort of the gag reel stuff. There's a lot of takes we just couldn't get through.We were laughing.