I'm terrible at metaphors or analogies. I don't know the difference, actually, ... For me, acting is like your dad teaching you to ride a bicycle. You feel totally vulnerable at first. You imagine yourself getting hurt, and the only thing that prevents you from crashing is your dad is running after you, holding on to the back of your seat. You keep looking over your shoulder at him, and he's going, 'You're doing it, kid.' And then, all of a sudden, you're, like, 'Why are you still holding on, Dad? Let go.'
I went to have dinner at their house before I even heard about the movie. We were in their living room and John just started strumming. He said he was waiting for June before he could get his nerve up. And I thought, 'Wow, this is Johnny Cash waiting to get his nerve up. This guy has played prisons and he's nervous.' Then June came in and they started singing On the Banks of the River Jordan and they're looking into each other's eyes, and the connection and love they had was palpable.
The expectation is this low, gravelly voice for John, but I went through his early recordings and there were songs in there where the voice was so different, I wasn't even sure if it was him singing, ... So it was interesting to me that we would see him develop the Man in Black sound. I thought it was really important that his voice change as his persona slowly solidified. The music was really the doorway into the character.
If you walk into a room and one hundred people say, 'You are a lovely, beautiful person', who isn't going to be affected by that? But you have to tell yourself not to value that. You have to tell yourself - or at least I do - to not become accustomed to hearing applause in any way, because I think that's dangerous.