I worked for 20 directors as a production designer, most male. I was on the set to witness firsthand a range of sometimes atrocious emotions - well-documented firings, yellings, fights between directors and actors, hookers, abusive things, budget overages, lack of preparation. A man gets a standing ovation for crying because he's so sensitive, but a woman is shamed.

We read about secret lives that people have on the Internet, or alternate lives of a serial killer where the whole family didn't know that their dad or their brother or their child was that. There are all the things in our heart that no one really knows, and I thought that that was interesting territory to explore.

I thought it would be quite a challenge to direct a mystery thriller. I hadn't really done something like that.

As a director, you try to do things that are going to touch the human experience somehow, and emotions that mean something to people. You search for those projects and you hope to realize the potential in a project.

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.

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 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.