I will never cease to be impressed by what happened in that scene.
Bucky was completely lost, terrified and in pain. Not only mentally, but physically as well. His prosthetic arm was damaged, his human arm was ripped from its socket and his ribs were likely broken from the weight of the beam that had crushed him. He jumped dozens, if not hundreds of meters into the water where the Helicarriers were falling and with both arms damaged he found the strength to not only to swim, but also to pull Steve to the surface and tow him to shore, which was far, far away.
Do you know how impressive that is?
It's not just physical strength, as Hydra likely pushed him beyond his limits many times, but the mental strength he found within himself at that moment. And how much he loved Steve Rogers to bring to do it. Platonic or romantic, however you prefer to interpret it.
I will always be impressed by this, even now, 12 years later.

















