Q: Can you talk about the training for the kind of Fred Astaire fight sequence and the zero gravity situation in the elevator?
Christopher Nolan: Well I’ll leave Joseph Gordon-Levitt to tell you the bad stuff. Really, the thing I just want to point out that the people might not be aware of watching it is that we had a stunt guy, who looks exactly like Joe made up perfectly, and he stood there on set every day for three weeks and didn’t do a thing because Joe insisted on doing absolutely everything himself, apart from one shot. There is one shot where the stunt guy performed. Everything else he did himself and did just the most incredible job with these bizarre rigs and bizarre sort of torture devices.