i stumbled on a video a while back of a really great trick. The magician hands out two decks. one red and one blue. He asks the spectators to put the cards behind their back and pull a card from the middle of the deck and place it on top, face up. They bring their hands forward and the face up cards they have chose, are the same. The chosen cards are then turned over and the man with the red deck has a blue card and the man with the blue deck has a red card. I've created a working version but it lacks some major finesse. If this isn't published, is there other material similar to this?