Thor was a veritable god with might that not even the serum could properly match, but that didn't mean he was totally invulnerable, and the Soldier had been taught very well how to go for the weakest areas on anything. He twisted, lifted his metal arm, and jabbed the fingers as hard as he could towards Thor's eyeballs.

His aim was to drive straight through and kill him, but that likely wouldn't happen. He would, however, take just popping his eyeballs and blinding him. Surely he could manage that much, because he needed to get down and away from Thor so that he could pick up Steve and escape with him to somewhere quiet where he could figure out what the hell was going on.

Why he saw snippets of another man's memories in his head, why he felt like nothing was more important than protecting him. Not orders, not HYDRA, not anything.