Sometimes you just have to throw caution to the wind and let fly when the situation is hopeless. If there's no chance you'll get out alive, you have nothing to lose, after all.

Except perhaps looking stupid. Yeah, maybe better to restrain yourself! Dying in a game is reversible. Looking stupid is something your fellow players will remember forever.

Transcript

Han: Don't be silly, Princess. You can't be Obi-Wan. You don't even have a beard.
Boba Fett: Enough of this nonsense. I shall pluck the truth from your pickled neurons.
Darth Vader: Tie him up.
C-3PO: The time to act is not now!
Chewbacca: Tally-ho!
{Chewie attacks a clone trooper}
Chewbacca: Take that, miscreant!
[SFX]: thump!
C-3PO: Oh, no! No, no, no! Stop, Chewbacca, stop...!
Han: Stop, Chewie! I have a plan.
Chewbacca: What, seriously??
Han: No, but you were going to get yourself killed. I'm not worth that.
Clone Trooper: Hey! My name isn't "yourself".