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.

When I've written for Bill Murray - I've written six films for him - people would read it and say, "Oh, that's so perfectly Bill." He'd read it and say, "Are you kidding? I can't say these words." So it's all about perception.

When a director writes, there's a compulsory arbitration. You have a right to challenge any of the arbitrators, but they pick three of four arbitrators who read all the drafts with no names attached and then allocate credit.

We are all several different people. There are different aspects of our nature that are competing.

If people work together, if they can keep a cooperative spirit and use their ingenuity and balance it all with good humor and good will, then there's nothing to be afraid of. That's the sappy part of it, ... On the other hand, every Halloween for many years when my kids were trick-or-treating I would put on my 'Ghostbusters' jumpsuit with a police flashlight to protect all the kids from ghosts.

Multiplicity was a movie that tested really well. People seeing the movie really liked it, but then the studio couldn't market it. We opened on a weekend with nine other films.

Whatever bliss we think we're going to find, we may find it in brief flashes, fleeting moments that come and go. There's an impossibility to nailing down any good feeling.