It definitely could have been a horror story [Valley of Violence], oh my God, if the dog was impossible. So could the horses.

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.

Ethan [Hawke] just - they got along great. He got to act with a dog, for real, and it felt like Jumpy was acting with him. It was a surreal thing to watch. When you watch the movie [Valley of Violence], you just kind of accept it. But if you do think about how we show - there's a dog and a movie star interacting - and you buy it. That's crazy.

You have to. But I generally try - I'll creep in the back. I'll be outside. I'll pace around. I don't really get that nervous about whether people like [my films].

I found Jumpy on YouTube. I wrote a movie about a guy with a dog and was like, "What have I done? This is going to be a nightmare. We're a small movie and we're never going to be able to do this."

I do think, even though I've made these genre movies, there's what happens in the movie and then there's what the movie's about. And for me, what the movie's about is so much more interesting.

It's this long monologue [in Valley of Violence] with Ethan Hawke talking about life and everything with a dog. That's not in movies. Hopefully when people think about the movie when they go home, they're like, "That's weird. He's maybe crazy. He's talking to a dog the whole time."