I'll never forget John Heard doing Shakespeare In The Park with Raul Julia and Richard Dreyfuss. It was 30 years ago, I guess. It was Othello, and John Heard played Cassio, and while everyone else was "Acting!" Heard came on talking normal, and everyone in the audience was leaning in to follow him. I wasn't doing that in Bus Stop. I think in that performance, I was putting it out a little too much.

With comedy, you really want to work things out beforehand.

I had read the Animal House script, and by hook and crook, I finally got an audition. It was a great one. John Landis followed me out into the hallway afterward and said, "I've never done this before, but you've got the job. Now don't tell anyone!" I've never had a director do that. It was one of those Hollywood-dream-come-true stories. They saw me as a surfer or cowboy, not a preppie, but someone begged and borrowed me an audition, and I went in and got it.

When I worked with Chevy Chase, Michael Ritchie would say, "Just ad lib and try to break me up. Just insult me. Anything." When we were doing his close-up, or when my back was to the camera, I would come up with jokes or quips or anything, to get a real reaction out of him. He was smart enough to know that was gold. So it was great fun working with him and Michael, and getting to see how the two worked together. I think Fletch and Clark Griswold were Chevy's two best roles. He's so incredibly talented and still vastly underused.

To me, as a director and an actor, that's the main thing. "What's the heart of this story? What's the humanity of this story? And if the movie doesn't have it, then why am I watching it?" Even if it's a silly comedy, like Superbad or Knocked Up - Judd Apatow, I love, because he's all about heart. The humor comes out of the humanity.

Sam Kinison was one of the most compulsive people I'd ever seen. James Belushi was that way, and Chris Farley was that way. He was incredibly talented and made me laugh so hard, and there was nothing he wouldn't say. Such a unique, amazing, cynical, realistic, but still optimistic look at life he had. It was great fun to get to know him.

I'd been working on more traditional movie sets and TV shows at Universal. All of a sudden, here we're on location in Animal House, and it's down and dirty and quick. It was the way the new commercial world was shooting; the way the indie world was shooting. These were lighter, faster cameras. It was a generational change.