"I'm gonna stop you, relax." He sounds so confident. It's entirely by accident that when he opens his mouth again, it's with a magic edge. "Just- Punch me. It's fine." At least it's a very simple instruction. It compels Steve to do it, but maybe he's got enough raw willpower to fight it.

He takes a deep breath and steadies himself, because Steve'll probably protest again, and then he'll give Tony a second or two to brace anyway.