Bruce found it interesting that Steve seemed cautious of him in return. After all, most people who didn't know about the Other Guy treated him as though he were a complete non-threat, and that was totally by design. He was calm, softly spoken, and not particularly physically threatening. But Steve was looking at him just as warily as Bruce felt like looking at him in return.

"It might help me if you were to tell me a bit more about what you're thinking and feeling, and if any of that is different to usual as well."

He went about setting up to get samples, take readings, and so on.

Bucky, in the other room, stared at the arm and then at Tony as he attached that weird suction cup thing to himself and then flailed his extra limb around. He must have worked almost solely on this to get it to this standard of design, and Bucky felt a mixture of tearfully grateful and wary.

"...Tony, I told you that I'm not interested in being part of any more experimental trials, even if they're for the right reasons."