2) The spectator is asked to select a card from the middle of the deck and show it around to the audience. The card is then placed on the top of the deck and then the spectator is asked to cut the deck, putting the chosen card back in the middle area of the deck..
3) To make this stunt even more impossible for the magician, the spectator is asked to give the cards a shuffle, and then cut them once more before handing them over to the magician.
4) The magician then fans through the deck. Here is how he finds the cards. When the spectator placed his or her chosen card on the top, it was on top of a card the magician had memorized. When the deck is cut, it is now between two cards memorized by the magician - in a secret sandwich of cards. When the magician fans through the deck he looks for these two cards and notes the card in between.
5) The magician then cuts the deck so that the chosen card is on top and asks the spectator to name their card. He turns over the card and takes a bow.
6) But what if there are two cards in the secret sandwich, thanks to the shuffle? No problem. The magician simply cuts between the cards, taking note of which ends up on top and which is on the bottom. If the named card is on top, the top card is turned over. If it is on the bottom, the deck is turned over.
Helpful Tip :
And what if there are THREE cards between the sandwich ? This is rare, but is still a possibility. Cut the first two to the top of the deck, and put the deck behind your back as you explain that it is sometimes easier to feel your way to the right card. Take the top card and put it reversed in the middle of the deck. If that card is named, spread the cards and show that the chosen card is reversed in the deck!
This play it safe trick is a useful backup to have.