Effect: The magicians displayes a deck of chard which are all different on the the face and also have the numbers 1-52 on the back. 2 audience members are asked to pick a card each. One pics one face up for the number on the back and the ohter picks one face down for the card face. The cards are turned the ohter way to display a new number and face. It reveals (In this case) a three of clubs and the number 42. The magcian asks one of the spectaors to reach under the table and pull out what is underneath. An envelope is pulled form under the table and opened to show the prediction..... "Tonight you will choose the three of clubs with the number 42"

oh my god! cool