“There's this biological association, when you do this movement, these things happen, and you're basically trying to rewire this 4-billion-year-old reflexive circuitry, which for me can be challenging if I don't really focus. It's the one of the few times as an actor where you are basically showing something with your body and your face that's completely different than what's going on in your mind.”
Source : Source: www.avclub.com