Unlike some of the time-travel movies I love like 'Primer' or '12 Monkeys ' 'Looper' is not about time travel. It's about this situation that time travel creates and the people dealing with that situation. So narratively the big challenge was to have time travel get out of the way.

When we're on set we kind of joke around and when we're rehearsing we change up the scenes and make each other laugh. We lighten up the mood. The blooper reel is going to be amazing on 'New Moon.'