He took it in, his face remaining expressionless as he listened and processed what Steve was saying. Even if none of it made any sense. "Okay. So...this earlier me didn't have an arm, either, right?" He could assume that. It looked like the wound had healed up long ago.
That part had been shocking enough for Bucky. What he didn't understand was the rest. "So....you said I was here before, but I have some kind of amnesia or something. I can live with that. I can live with the fact that we were abducted by freaking aliens. But how is it that seven decades went by and you and me haven't aged? I saw myself in the mirror, Steve. This face doesn't look ready for the Old Folk's home."