It's just one of those things like when you're not supposed to laugh, it makes it that much harder to stop laughing. And for some reason Zach [ Galifianakis] and I get in this feedback mood of giggling, and on the set of Hangover we just couldn't get through stuff.

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.

I'm a very jaded and cynical person.

The biggest thing that comes out of improv that gets built on is just character traits. You know, for me the singing was born out of improv.

People now genuinely respond to it and associate me with music. It's really fun.

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.

As an editor, you're constantly dealing with the best way to convey an exchange between two people. So when I'm shooting, I'm just aware in the back of my head what an editor might want.