"When I got the script of Inception, I was a bit puzzled by it," Caine said. "And I said to [Nolan], 'I don't understand where the dream is.' I said, 'When is it the dream and when is it reality?' He said, 'Well, when you're in the scene, it's reality.' So get that - if I'm in it, it's reality. If I'm not in it, it's a dream."