Kate Bishop and Tony Stark
Well this was new. Aliens in Vegas. Could things be any more cliche? Tony doubted it, but here they were dealing with aliens and ruining his very nice holiday thank you very much. He just hoped he could grab what he'd picked up before they ended up back home again - he'd gotten some really great shirts that he really wanted to come back with him. So you know priorities.
At least he had the armor with him, so that was helpful and he was able to deal with some of the smaller ships in the air with a few well aimed missiles, sending them falling into the desert.
Turning his attention to the street below Tony saw some of the others from town jumping into gear helping to get the civilians off the street and back inside where they could be out of the worst of it. And then he saw a sign fall, tumbling off the face of a hotel and down to the street, right where someone was standing looking like she was urging people to move.
Swerving quickly Tony changed course headed right for the falling debris, and catching before it could do any real harm, though he was fairly certain that he'd end up feeling that particular impact later on. Still, better than a squished hero. After he dropped the sign onto the street he flew back to her just to make sure she was actually okay and he wasn't congratulating himself too early. "You okay?" He asked her.