Ewok dies, and the camera lingers longer than it did when the Death Star exploded, killing billions of people. Twice if they speak to each other. Twice if it covers her neck. Three times if she's almost nude. Twice if it's the hyperdrive.
Rebel pilot is of a race other than white.
Emperor cackles evilly. Twice if he tries to kill them. The game ends when a bunch of Ewoks start dancing. No matter what you've been drinking, you will remember this image. The last person to give up drinking on each cue is the winner.