The two of them were slowly forming this sort of rapport with each other that was rooting itself in their similar sense of humor and unwavering sarcasm. Bucky felt that way, at least. In any case, he didn't feel like he needed to be on alert because Stark was going to blast him with something or verbally come at him about this or that (even though Bucky still maintained he had every right to do either without Steve's intervening). Bucky had nothing against him now that he and Steve had figured their shit out and were thriving as a couple.
Goat sunglasses. While Bucky hadn't been sure he and Tony would be able to call themselves friends it was pretty amusing to think they were kind of basing the launching point of what could be a friendship one day on a goat. The humor wasn't lost on him at all. But hey, they had to start somewhere.
Bucky had felt the way the arm sort of connected itself to his senses, his brain, and now had become a part of him again. It was nice to feel balanced again. He lifted his arm up and flexed a little, then wiggled his fingers, made a fist, then relaxed and unclenched his hand again. "Seems to be in working order," he said. "Thanks. I'm holding you to the sunglasses though. If you don't follow through I'm sending him over to nag you about it."