I'm very aware that the future of any film is not necessarily the theatrical experience, it's the home video experience because that is the one that is going to be presented for years to come. So you want to make sure that you push your movie, but you're talking about a movie that you finished months ago. And your head is trying to move into new grounds and you're still pushing for the other one. That's the tough element of it.

I think it's always important to give immediate positive reinforcement.

I find it very stupid that teenagers could only see caricatures of teenagers but they couldn't see films that you try to be a truthful context, a truthful portrayal of teenagers.

I have to say, 'Gravity' is better in 3-D, even though in 2-D the quality of the picture is better. But the 3-D is better.

The two real leads in 'Children of Men' are Clive Owen and the social environment. You know, this same movie without the social environment maybe is just like a generic chase movie.

I guess I have a short attention span! I'm interested in new worlds, new universes, new challenges.

It's a cliche, but Americans are puritanical. In their movies, they are scared of sex, but they overindulge in violence. I could have cut a G-rated version of 'Y Tu Mama Tambien' that would have pleased the American ratings board, but it would have been five minutes long.