Most of all people respond to a film tackling grave subjects that question and go against the prevailing mood.

It's always been difficult for me to speak and express my innermost thoughts. I prefer to write. When I sit down and write, words grow very docile, they come and feed out of my hand like little birds, and I can do almost what I want with them whereas when I try to marshal them in open air, they fly away from me.

In a novel, language is your principal tool, you try to build pictures in the mind of the reader. When you write a screenplay, the language is just a transition, the final goal is a picture on the screen, it's the only thing the audience sees.

I like speed in thrillers. It's a rhythm adapted to the subject.

I think about the sincerity of my writing. I try to be true, to pose questions. Shake people up a bit and make them look in a direction they wouldn't normally.