Extraordinary people are the Green Berets and the Navy Seals and the Olympic athletes - these are the ones who can face these extraordinary physical challenges and be triumphant.

I love the idea of documentaries. I love seeing documentaries, and I love making them. Documentaries are incredibly easy to shoot. The ease with which you can hear something's going on, somebody's going to be somewhere: That sounds so interesting. Pick up your camera and go.

I'm of Neil Young's generation. Neil Young's songs have spoken to what it's like to be at least a white male of his generation over the years. Endlessly, he's sung about the stuff that I really care about. He's put into words the feelings that hit you at different transitional moments in life.

I don't think it's sacrilegious to remake any movie, including a good or even great movie.

Documentaries - my God, there is so much going on in our country and in the world today that every time you open the newspaper or turn on the radio or watch the news on TV there is another documentary subject. We're getting the headlines for a second, shaped by corporate delivery most of the time, but what's really the story there?

Everything I've made - it doesn't mean they've all been good - but everything I've made so far, big or little, fiction or documentary, has been something that I've been really enthusiastic about.

If you're doing a music film, you've got to be singing about something.