It's really hard to explain, because it's a fucking prick of a job, you know? Particularly when you get successful with it.... People don't understand why your life suddenly changed when, hey, to them it's fucking ten bucks at the movies, it's over in a couple of hours. They don't understand the prep, they don't understand the real physical shit that you put yourself through. I mean, the last movie's an example— shoulder surgery partway through preparation. And it's a $100 million train, man, and I'm the fucking guy that drives the train. And I've got to get back on that train and make sure that this thing is completed.

GQ Interview (2005)