As a director, you've got to have quite a few projects going because you never know which one will actually come together with the financing and get the green light.

I like doing commentary. As a filmmaker and film student, I think it's really interesting to hear what a director did and how they figured out how to do things. I often like the technical commentaries myself.

Hardly any filmmakers can just make anything they want. Obviously, there are some exceptions, like Steven Spielberg, but he has that mainstream mentality and the kinds of films he loves to make are the kind that appeal to this big, mass audience.

Sometimes, a scene goes on too long and, with this being a suspense story and murder mystery that you're trying to discover through her heightened paranoia, you don't want scenes that take you on a tangent. Sometimes, you love those scenes, but you know that it's better not to be in the overall film. So, I'm not sad that they're not in the main movie, but I do think it's fun for people to get to watch them, if they want to.

Some of the best stuff in all my movies has been improv.

Even after I had just done Twilight, which made $400 million at the worldwide box office, I could not get financing for three or four projects that I really loved and I thought people would love because they didn't fit some studio or investor's model of thinking, "This will definitely make money." It's a business and a film does potentially cost millions of dollars, and they have to think that they're going to get their money back somehow.

I was told 50 percent of the population gets cancer. Everybody is going to be affected.