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.

Creative differences are legendary in this movie business, so we're really not exploring the creative-difference aspect as opposed to the money aspect, or the fact that something can come up in a movie and literally put the whole movie on the line, and this is where producers have to earn their keep.

There's no downside to having too much experience.

Even back in the '90s, I shot certain things on something that wasn't digital then, but it was on VHS with a smaller camera and we would up it to film.

I play around with human things, human relationships and that, and allow that kind of talk to work in that way, on that level.

I think we are seeing a radical shift in the business in general. The studios are making much more of the real big extravaganzas and there are other kinds of films that are coming out. I think you are going to begin to see more diversification that we've seen in the past.