Casting ethnic characters is a very hard thing to do, but it's important. It's also interesting.

The only way I know as a director is to figure out what the film is about. And out of the theme and the sense of what the film is about, all those decisions start to make sense. But to find that truth within it, you have to limit your possibilities and limit your choices. That's where this visual language grows out of.

These wrestlers aren't organized. They have no union, no pension and no insurance. You meet wrestler after wrestler who sold out Madison Square Garden ten years ago, basically running on fumes today. There's a lot of drama there.

When I go to movies I generally want to be taken to another world.

CGI means, just to be clear, creating any type of image with a computer. Basically, starting off with nothing, or with images and manipulating them. The way we did it, everything was actual photographed images. A lot of that stuff was shot through a microscope of chemical reactions, yeast growing, lots of weird things, by Peter Parks. We put it into a computer and collaged it, manipulated it. Meaning we digitally shaped it to fit with other images. But there was no computer-generated imagery at all.

The whole visual language of the movie is developed way before we get to set. Especially when you're doing visual effects and you don't have a lot of money to mess around, which we didn't, you have to really preplan everything. Pretty much every shot in the film was figured out months before we got to set.

You hear stories about directors using manipulation to get actors to do certain things, but I think when you're working with professional actors, it's all about trust. They can do anything you want, it's just a matter of them understanding what you're looking for, and the reason why.