Big Deal by Magic Tao
The spectator is shown a deck of cards. They are then handed cards numbered 1 to 5 , which they shuffle, then freely choose any two. eg, a 4 & a 1. They then have a choice of using the number 14, or 41. Using simple maths, the freely chosen number generates the spectators lucky number.
The deck of cards is then dealt through, and the card that lies at the spectator’s number is shown to match a prediction that has been on show at all times. You can deal one card at a time, right through the deck, and there are no duplicate cards. Indeed you make a point of what card they would have ended up with, if they had chosen to start off with the other number. What you receive is the special deck of Bicycle cards, the 5 number cards, an envelope cointaining the prediction on a large Bicycle card, and a DVD with full instructions on handling etc.