Let me get one thing straight though… Even if Bucky didn’t have innervation in his arm (aka he couldn’t feel anything other than just pressure, ergo couldn’t feel the arm being blown off) he most definitely felt the searing hot metal that was attached to his fucking shoulder. The metal was glowing red hot where it got blown off. Like if you leave the end of a spoon over an open flame and then grab the other end you still burn the shit out of your hand. So imagine your entire shoulder/biceps is made out of metal and the end of it is so hot that it’s glowing red. You don’t think the skin and bone and muscle it’s attached to wont be burning? Like imagine hot metal touching your bones. Bone pain is literally some of the worst kind of pain you can feel and Bucky had searing hot metal attached to his bones. And beyond that it’s still burning his skin, his ligaments, and his muscles. It’s beyond just burning your hand on a hot object because the metal is integrated into his shoulder. And worst of all he can’t get the thing off. He can’t drop the hot spoon because it’s part of him.
So yeah tell me again that Bucky wasn’t in excruciating pain after that