It's always so embarrassing when someone is eavesdropping on your conversation.

Try this in a game: The PCs are having a discussion about what to do, or where to go, or the usual sort of stuff that players discuss all the time, thinking that their deliberations are private. But have someone be eavesdropping on them. A street urchin, or a cunning blackmailer, or a member of the town guard - whatever will be able to generate the most embarrassment or difficulty later when they pass the story on to someone else...

Transcript

Darth Vader: That may have been a mistake.
Darth Vader: I was convinced Naboo was wounded, crippled, in great pain. But it was my wound. My pain.
Darth Vader: I projected my suffering onto others, who never deserved it.
Luke: See? You don't just have compassion for me, but for everyone. You always have. You've just been suppressing it.
Luke: Join me and overthrow the Emperor! We can bring peace and equality and freedom to the Galaxy.
Darth Vader: Peace... to the Galaxy. Democracy. Shared prosperity. It does sound... welcome. But...
Darth Vader: No, I'm irredeemable. I murdered Obi-Wan. Force Disintegrated him.
Luke: No, you didn't! There's no such power! You used Force Transcend! His physical body released, he transcended into a cloud of midi-chlorians.
Darth Vader: I... don't believe you.
Obi-Wan's voice: Believe it, Padmé. This existence is... different, but it's still me. Listen to Luke.
Darth Vader: Obi-Wan?
Anakin's voice: OBI-WAN!!!