Exploding Head Syndrome
Tony's having a hard time remembering how he crossed the distance from the grassy knoll to Peter, and he can't really recollect how his hands ended up on either side of the kid's face. Before he knows it, he's gripping the kid's shoulders just as tightly as Rhodey had gripped his own, his hands trembling. "Pete, kid, c'mon. Say something. If you don't say something I'm gonna seriously lose it here. Don't fucking do this."
A pair of headphones rattle around Pete's neck. Tony's shaking him.
Maybe he'll come to, like a half-drowned puppy you pull out of the gutter.
Then just as suddenly he's not shaking him, because Quill is prying his hands back from the kid protectively, and Strange's palm is pushing Tony's shoulder to put some distance between him and the boy. Everyone knows Peter is a special case, for him. A special mission set aside to complete. He promised May. He promised Peter. He held him while he disintegrated. He washed him down a sink and apologized in multitudes. Someone seethes, "What do you mean, he didn't come back? What do you mean?" and he recognizes it belatedly as his own voice.
*******
Everyone comes back, when the snap is undone. Or, well — almost everyone.