[R2-D2 is playing a chess-like game against Chewbacca, who roars after one of his creatures is defeated.]

He made a perfectly legal move.

Let him have it. It's not wise to upset a Wookiee.

But sir, nobody worries about upsetting a droid.

That's 'cause a droid don't pull people's arms out of their sockets when they lose. Wookiees have been known to do that.

[Chewbacca leans back with his hands folded behind his head, for effect.] [considering]

I see your point, sir. I suggest a new strategy, R2. Let the Wookiee win.