I've done it with all my films. I always keep an eye on the first time I show it because... I don't know. Neurosis.

Tommy Nohilly, who plays Tubby [ Valley of Violence], he came down to see the movie for the first time and I was like, "You've got to come just to see people react to your [big scene]." I knew that would go well, but it's satisfying to me when he's sitting there and it actually does.

I don't think you want to preach to people. I don't think In A Valley Of Violence, and the same with The Sacrament, there's a social commentary and a political element to both the films, but it's not like, "Think this because I think this."

The first half [of Valley of Violence] was to endear you to all these people and give you all these archetypes that you're familiar with, and then the second half, just to see all those archetypes unravel like real people.

I like movies that leave things in the hands of the audience.

Technology has just been the major progression of the last 15 years - instant communication. That stuff has gone so global. That's what's interesting about it. When someone sits down in front of a computer, it's the same everywhere in the world, and it's the same screen looking back at you with the same Google, and there's no individuality to it. So I decided it would be kind of visually uninteresting to have in my films.

That's what's interesting about people. It can be funny, but when [John] Travolta got there and did [comic moments] you're like, "Oh! This is really funny." Or when Karen [Gillan] and Taissa [Farmiga] do something, I'm like, "This came out so much funnier."