He does stop... for all of two seconds before he redoubles his attack using two fingers and really giving it (in a gentle way) to Tony. And then he lets up. The Hulk grins then, satisfied, and this time he actually does laugh; it's rusty and abrupt and short, but it's a laugh, and it leaves him lightheaded. He relaxes back against the ground, sighing.

"Don't have much time." He looks down at Tony, and he feels a surge of affection that he knows is his just as much as it's Banner's. He'll never find another person like him, and that thought is upsetting in a general way but warming in a very specific way. He touches Tony's cheek gently.

"Stay with Hulk?"