My approach to violence is that if it's pertinent, if that's...

My approach to violence is that if it's pertinent, if that's the kind of movie you're making, then it has a purposeI think there's a natural system in your own head about how much violence the scene warrants. It's not an intellectual process, it's an instinctive process. I like to think it's not violence for the sake of violence and in this particular film, it's actually violence for the annihilation of violence.