I think that music at inappropriate times with inappropriate volumes can be the funniest thing ever.

All I knew is that I loved movies and comedy and TV, and I wanted to perform. I made a bunch of shorts and movies in college, and that was always fun too. I directed some plays in college. It was taking it all in and trying to immerse myself in as much of it as possible.

I happen to think singing is hilarious, especially when it pops out at the wrong time.

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.

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

We did some camera tests blacking it out, we made a prosthetic with a gap in it, but that made me look like a donkey, so I vetoed that right away. And then I just finally called my dentist and said, 'You know, I've had this implant for 20 years. What's it involve in taking it out?' And he said, 'It's actually not that big a deal. We can do that.' So we took it out and I was toothless for three months, for the run of the movie [ The Hangover] .I take my job very seriously.

I found myself often asking the question, "Who deserves to be made fun of?" Depending on your mood, the answer can be no one or everyone. It took me a while to understand the math of how those field pieces came together. I don't think that ridicule is ever funny, but there are times when that gets the biggest response.