IN TAKING back a pack which has been shuffled by a spectator, note and remember the bottom card. Turn your back and holding the pack behind you invite a spectator to make a free cut, then take off the card on the lower section, look at it and remember it. As he looks at it turn facing him and explain that you propose to find his card by the fingerprints he leaves on it. Meantime quietly slip the bottom card, your key card, to the top of the portion left in your hand after the cut. Turn your back again, spectator replaces his card and then the portion the cut off, and carefully squares the pack. If you care to, let him give a short overhand shuffle, there is small risk of the two cards being separated. Under pretense of looking for fingerprints, find the key card, the one above it is the selected card.