I am a smoker, I'm ashamed to say. I had given it up for many years, then picked it up again. It's a horrible habit. I struggle with myself all the time. And I love to smoke.

It's not exactly an interview that's going on [in documentary]. I guess we do ask Edward Snowden some questions and we're recording him answering them and so on like that.

The director is the captain of the ship, without question. No matter what their talent or energy level is, everyone on the crew has all eyes on the captain. If they come in going, "I don't know. Maybe we'll do this. Maybe we'll do that," you've got 10 days to shoot and they don't care what you're doing.

I have some close friends I keep in touch with. I knit. I watch a little too much TV. I ski, if the weather's right for that. If I can find a group of buddies, I go rock climbing.

I'm very, very serious about what I do. I think there are a lot of people out there sort of thinking it's anybody's game. You know, "You pick up a camera and you make a movie." My experiences over the years have taught me there's a lot more than that to making a film - there's also getting the film seen, and all kinds of complex realities.

I do, however, have tape over my eyepiece as well. What I think my peace is saying isn't, "Oh I have something to hide. I don't want you to look," it's more saying, "No thank you. I prefer you not look. I'm not giving you permission."

I have been known for almost 30 years to sort of do whatever comes my way. It's always been touch-and-go after each job finishes. I just like to be working.