You experience things and then they're over, and you still can't explain them. Gods, aliens, other dimensions. I'm just a man in a can. The only reason I haven't cracked up is probably because you moved in. Which is great. I love you. I'm lucky. But honey, I can't sleep. You go to bed, I come down here. I do what I know. I tinker. Threat is imminent. And I have to protect the one thing that I can't live without. That's you. And my suits, they're Machines. They're part of me.
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From: Iron Man 3