“He said, ‘How old are you, Tom?’ I said, ‘I’m 29.’ He said, ‘OK, I want your war face, the face you’ve been doing all day for all these battle scenes, all the hell fury. You’re strong and courageous and you’re 29. Then you see the guns and at that moment, I want you to de-age yourself by 20 years. You’re a 9-year-old at that moment. I don’t want you to do fear, I don’t want fear or horror, I just want to strip away the man and see the boy.’ It was the clearest and purest notes I had ever been given.