Due credit to [MENTION=2]Piratecat[/MENTION] for this one:
In his 3e adventure
Of Sound Mind, there's a section where the characters each have scary dreams caused by the big bad. The advice is to hand each player a paper with their character's dream on it, give them 30-60 seconds to read it, and then take the paper away -- to simulate how hard it is to remember dreams when you wake up.
I did this and the players' minds were BLOWN. Some of them attempted to recount their characters' dreams (with hilarious, to me, mistakes) while
one player utterly refused to discuss his dream because he / his character was so disturbed.
Great technique and one I highly recommend as a one-off. (You really can't use it more than once.)
= = = = =
Different group.
High level (17th level) 3e party traveling the Astral Plane
en route to plot location. They come across a mind flayer and his (strong) group of thralls and (wisely) don't immediately attack.
I (the DM) have the mind flayer begin bantering with the PCs, inquiring where they're from, how they got here, where they're going, etc. The characters are understandably cautious.
Meanwhile I pass a note to the player of the Psion character that says something like the following:
"The mind flayer is communicating telepathically with you. It has read your mind including the part closed to you [part of the PC's backstory from 1st level]. It will reveal your own secrets to you if you sell out the rest of the party, right now."
I didn't really expect the player to go for this, but he was *astonished* that I remembered that detail from his character's background. So his mind was blown.
The Psion's response was: "Your kind disgusts me, mind flayer. Depart immediately or we will destroy you."
The rest of the players were like "WTF?" when the mind flayer abruptly departed. To this day I don't think they know why.
