Which is interesting, since you didn't read the script for Fish Tank before joining the cast. She didn’t even give you all the scenes during filming—just fed you batches of the script week to week, right?

Yeah, I'd seen Red Road and I really liked the way [director] Andrea Arnold deals with her characters. She doesn't give the audience an easy out. I had to play it pretty much close to myself, because I didn't even have reference points having not seen the whole script. Her characters do very ambiguous things to one another, and that's what makes it interesting. We have the capabilities to do these things, all of us. We just make certain decisions at certain moments. That's what makes it uncomfortable, as an audience, to watch.

Michael Fassbender in GQ January 8 2010