Surviving the grind of 18-hour days and getting up at four in the morning to work out for an hour so I'd have the energy to do it again the next day. I did not know I had that discipline. I did not know I had the discipline to learn a seven-page scene in three hours to shoot that day or the next day. I didn't know that I was capable of realizing that potential.

Every role is challenging in its own way, but the most challenging roles are the ones that are badly written - then it's completely up to you to come up with something that is interesting to the story and myself as an actor.

I wanna be in action movies, I wanna be the tough guy I wanna scare people.

I had been used to improvising and even in the audition I was feeling free to rearrange Aaron Sorkin words a little bit, as lovely as they were. I didn't find out until after I got the part how furious Aaron was at me for doing that. They said, "He was livid. He did everything in his power not to jump down your throat!" But I came to realise that Aaron was writing in metre and the rhythm of the language is very important.

I love David Fincher - even though it was just two scenes, I loved the way we worked and could tell by the way he was shooting it that this was going to be an affective movie to say the least.

I am one of the lucky ones; believe me, I haven't forgotten that.

Surviving the grind of 18-hour days and getting up at four in the morning to work out for an hour so I'd have the energy to do it again the next day. I did not know I had that discipline. I did not know I had the discipline to learn a seven-page scene in three hours to shoot that day or the next day. I didn't know that I was capable of realizing that potential.