[Bucky manages a smile that doesn't look completely strained when he spots Steve, and it doesn't really occur to him that they probably look a little ridiculous sitting here in the hallway wearing uniforms that make them look more like superheroes than regular soldiers. That's the new normal, and has been for a while now.]

"Yessir"? [He even sounds genuinely amused, because hey, did you forget?]

Pretty sure you still outrank me, Cap. Unless they decided I deserved some extra promotion for getting my dumb ass killed.

[... Oh oops, should he not be joking about that? He definitely looks like he just realized he's not sure if it's okay to joke about that. God, he's an ass.]