A packet trick by Stephen Tucker. A spectator selects a card from a full deck. You bring out a packet of cards and offer to reproduce his selected card. Something goes wrong, E.G. the spectator selected six of Clubs, while three of your cards are 2 of clubs and one is blank. After a routine where the blank card dissappears and reappears, you add up the three 2 of Clubs = 6 of Clubs! But the spectator isn't really happy until the three 2 of Clubs dissapears and is printed on the blank card as a 6 of Clubs, leaving you with three blank cards and a 6 of Clubs!