I did a different production with a different director and Bill Pullman. Oleanna­ - the one you saw - we were doing right after Bourne Identity or right after it came out.

When Paul [Greengrass] was writing, he'd send me story ideas that he had. He was particularly interested in social movements and revolutions that had been happening all over the world, and how computers and the internet had helped those movements. He encouraged me to read a book about Anonymous, the hacker group called "white hat" hackers, meaning they're driven by ideology and social disruption as opposed to just greed.

It's not my job to critique the writing. I'm there to serve it. I had to figure out a way to make it work.

I always loved how people like Jon Voight and Laurence Olivier shocked you every time they came on-screen. They were so different each time. That's what I hope to do with acting - be the chameleon and not get stuck in a type.

The exercise in theater is night after night you are doing the same play, but you have another opportunity to explore. It changes nightly even because of the audience and your day going into the evening of the performance. With film it's much more controlled.

My regular school didn't know what to do with me!

Bill Pullman is older than Aaron Eckhart - although I was older too - and the age difference changes the play. My perspective on those issues had changed a lot. Without going into nerdy details about that play, there was something that still stuck with me. I still had the same joy in that dialogue and David Mamet's rhythm in terms of his writing. I felt like there was still something to explore.