Peter Duffie's Pick Me, Pick Me Not

Introduce six jumbo playing cards and freely display them face up. State that two of these cards are unique, but give no more information. Hand the cards to a spectator who cuts them and keeps the top card. A second spectator also makes a fair selection of one card. Take back the remaining four cards and turn them face down. Display the first card: on its back is printed, in bold letters, You Won't Pick Me! Take the next card onto the first and show the back which also says, You Won't Pick Me! Display the third card and then the fourth, having the same message printed on the backs. Finally ask the two spectators to turn their selected cards face down and they are amazed to find the words Pick Me boldly printed on the back of each card!