"I'm not watching you be poisoned by an arc reactor I made, that's in your chest because of a missile I designed," Tony said, leaning back slightly, lacing his hands together and staring at them. "This is on me, Pepper. I'll take the hit, because I should have- I should have taken the other one. There shouldn't have been one."

Somewhere, he'd messed up. Hadn't seen everything coming, hadn't covered all the angles. Some genius.