The killing of Zod gave a reason for the character never to kill again. Superman falling to the ground and screaming afterward — I don’t think that was originally in the script, but I wanted to show the pain he had. I did far more emotional takes they didn’t choose; tears were happening. He just killed the last remaining member of his species. That’s the choice he made in that moment, and he’ll never do that again. There’s an opportunity for growth after that, to explore the psyche of Superman as a deep, seemingly invulnerable god-like being but with real feeling on the inside. As I always say, ‘The cape is still in the closet.