I don't know what Bruce Willis has done in real life. We know actors have certainly had tirades - that's for sure. I never had troubles with him, but the big issue is really less about what Bruce is, as opposed to - this behavior has taken place, and sometimes it came out at something that had credibility, as opposed to, "No, I want to be fat and have a beard." Other people say, "I don't give a damn about the credibility. I paid $20 million. I want to see a movie star."

Rain Man certainly didn't test really well. If you look at it carefully, you have a disease autism they didn't understand back then, they didn't know in the test audience whether it's okay to laugh or not laugh, because it's a film that's done in a way where, "Well, maybe I'm not supposed to laugh." At the end of the film, Dustin Hoffman gets on the train and doesn't even acknowledge his brother. Not even a glance, nothing. That's why the studio said, "Can't you just have him look at Tom Cruise at the end of the film?"

Producers - we always think, "Well, producers are very powerful," but producers don't really have the power. It's the appearance they might, but they don't. Even the actors don't. Even the studio heads don't, because they're beholden to this corporation and what the corporation wants. So no one really has the power, and everybody's trying to get through the day, and everybody's nervous and desperate.

If you test Iron Man and that audience doesn't respond well, you can be damn sure that there is something wrong with the movie that you have to address. Because they're expecting a certain amount of action, right? They want a hero. There are certain things that have to be compatible with the way the audience is thinking about it. If you take some other film, like No Country for Old Men, you can end up with all kinds of crazy reactions.

Different reactions while film test screening doesn't mean even the audience thinks ambiguity is a bad thing. But if you're asking them right away to start checking things off, they don't know what to do. I think at their best, it applies to when the audience knows what it is. Then, when they say, "Oh, well, I thought it was too boring in blah-blah-blah part," then you better pay attention to it. It's like going for the hamburger. Better be the good hamburger I went for.

Ronald Reagan was this actor who was going to be president, and he was very charming. What he had was, he talked about America in ways that got people all caught up in it. He was creating this America - it could even be the mythical "America" - that we subscribe to.

I thought a great line in the What Just Happened movie said, "We're just the mayonnaise."