I'm quite good at switching off and sometimes I forget who I am in a character.
Sometimes I comment, but you have to be careful because if you do it for one, everybody wants you to say something.
Sometimes it's not about the size of your role, it's about the machine that you're part of.
It was very weird because for a long time no one really recognised me from my films, but 'The Hobbit' has totally changed that, and I've had some really special moments, especially with youngsters.
Most of the time, you do films and they can be big films, but you are rarely aware of the fan base that comes with it.