People say you never remember anybody who dies in movies, and it's true, you don't. You don't even remember people who disappear. Although the moment that it happens might be terribly sad and moving, five minutes later, if you're asked to remember that person, you go, "Oh right, yeah, yeah!" 'Cause you're just moving forward.

I've never done a film before where every single person in the audience knows the ending. I mean suspense, twists are almost impossible these days. People are blogging your endings from their cinema seats.

You can do anything you like - really - but this Sci-Fi is absolutely disciplined, it's Zen, you have to be absolutely focused in an area. You have to zone into an area and you then you can achieve when you get there. It's really weird!

Actors are steeped in a world of agents and where the next job is coming from and what are their expenses and what is the hotel like. You want to take them out of that world and dump them into another world, so that when you meet them on the screen they don't seem like the guy who was in two others movies that year.

I always say to anybody who's going over to America for the first time, 'Whatever you do, go and see a popular mainstream film with a big audience.' Because people shout out. You never get that in Britain. Everybody's so quiet, scared to laugh. It's like being in church.

That survival instinct, that will to live, that need to get back to life again, is more powerful than any consideration of taste, decency, politeness, manners, civility. Anything. It's such a powerful force.

We want to see drama told in a cathartic way, with power, with emotion where you empathize and then you're frightened. All those feelings charge up in you and you feel for the story.