What infuriates me is that in America violence is judged in context, whereas language is not. So with language there is an arithmetic that says: one f*** is a PG 13, two f***s is an R. They don't say: one bullet through one head is a PG 13, two bullets through more than two heads is an R.

I think that London is very much like that. I find there's humour in the air and people are interesting. And I think that it's a place which is constantly surprising. The worst thing about it? I think it can be smug and aggressive.

But this is where you get all the market research and things get in danger of becoming formulaic, and where you depend on brands and getting recognised actors. It's the thing that precludes risk very often, otherwise everyone would be avant-garde all over the place.

It was mainly to do with Helen Hunt, to be honest. That's what drew my attention to it. I was interested in the fact that she was going to be directing. I'd never met her but she projects a degree of intelligence and it was convincing t me that she'd be able to handle this sort of material very well.

If I'd loved my chemistry teacher and my maths teacher, goodness knows what direction my life might have gone in. I remember there was a primary school teacher who really woke me up to the joys of school for about one year when I was ten. He made me interested in things I would otherwise not have been interested in - because he was a brilliant teacher. He was instrumental in making me think learning was quite exciting.

I work with the options I have in front of me and my reasons for choosing a job can vary enormously depending on the circumstances. Sometimes I take a job because it's a group of people I'm dying to work with, and sometimes it can be a desire to shake things up a bit and not to take myself too seriously.

Nothing brings you closer together than blind terror.