I can't imagine a successful comedy movie without a successful comedy performance at the heart of it.

I made a handshake agreement with my best friend in college, Michael Shamberg, who is now a movie producer. We used to write shows together, and we said, "Let's only do what's fun. Let's never take a job where we have to dress up in a suit."

Most comedy is not very ambitious. You probably can't name more than a handful of comedies that would qualify for Best Picture.

Most comedies are calculated. They tend to pander. They're not about anything important.

Ive never been a big believer in ghosts or the spirit world, and for me, that was part of the point of the movie, ... What the Ghostbusters represented was the triumph of human courage and human ingenuity. People create their own monsters. Our fears come from within us, not outside.

If you're doing six takes, instead of doing six variations on the same words, why not just throw out the words and make them up as you go along, if you're comfortable with it? It gives the movies a slightly rangier feeling, and more of an accidental feel, but it also makes them edgier.

I've never taken a script to the stage or to principal photography and said, "This is perfect. This is as good as it can possibly be." It's not Shakespeare, you know; you know it can probably be better.