Maxello Magic

A spectator selects a card from a pack of cards. Magician displays a jumbo card fan. One of the cards is face down in the fan. He asks the spectator to spot his selected card in the fan. The spectator says it is not there. Magician says that the one face down card in the fan is the spectator's selected card. Then the entire fan of cards transforms into a giant size replica of the spectator's selected card.