"I was kind of scared at first to do that [vice-over] because when you're on set, a lot of the things going on around you - the environment and playing off other actors - and that's what makes it easier and helps you to be in your character. So, realizing you're not going to have that and you're going to be secluded in this booth, it's like, "How am I going to be a character when I'm just in these walls?""