"You have formal rehearsal, a lot of things you don't have in movies - which is, you have to formally rehearse. You have to know your back story, discuss it, and almost everybody onstage has to know each other's [story], so that when it comes time to actually do it, you can throw it all away. That's the way I like to - and I didn't realize until very recently - that's the way I like to prepare for movies."