Offline
I just created and released a deck of 52 cards, each one describing something horrid that the character is the unfortunate witness to. The idea is that the Game Master hands the card to the unsuspecting player, and no one else is privy to what they have witnessed. The Game Master is the only one that knows if the situation is reality, or if the character is undergoing a delusional hallucination, or something more sinister is happening...

http://www.rpgnow.com/product/127037/Horror-Cards