"Wait, you're—" But Tony's off again and Bucky needs another hop-skip to catch him up and then, then they're swiping and key-coding their way into the building, apparently no one around to stop Tony or care who he's got with him. Bucky's not exactly going to advertise that he's somewhere he doesn't belong either, instead peering through the few windows they pass to see anything he can see.

He loses his breath entirely when they enter the new lab, lost in the way Tony saunters through it, seemingly at home amidst the wondrous chaos. It's better than he ever could have imagined and he's actually here.

(Or maybe he did take a pain pill and this is all a hallucination. If so, well, he kind of doesn't want it to end too soon.)

Finally wandering away from the door he tries to parse everything that's spilled out of Tony's mouth since introducing himself. "Are you really, actually Tony Stark?"