Bucky's head is plunged under the water and there is ice, ice in his mouth and his nose and in his lungs. He chokes on it, sputters, fights the ever losing battle to stay awake, stay aware as the chamber fills.

No, that's not right.

His eyes force themselves open for a moment, water stained pink by the blood from his head and hand muddles his vision above. For a moment he can make out Thor above him before his eyes squeeze closed again against the stinging cold.

The feeling of choking, freezing, is all too familiar and in the end it's easy to let go, to stop fighting as his limbs go slow and sluggish. His body numbs, he couldn't open his eyes again if he wanted to and then, as it has so many times before, everything finally just stops.