That grin is pure mischief and evil and Wash gives him a wary look. What was he up to? He had seen that smile before and it usually ended up with a reprimand from the Director for them doing something monumentally stupid.

The wrapped package is not what he expects, the wariness melting away into confusion, and then, when he's opened it, pure shock. There's a sealed package of Three Musketeers there, real ones. "York you- how did you get these? I- I can't accept these. They're yours."

Why would York give him this when a few hours ago they'd been at each other's throats?