The performer predicts a drink that is inside a brown paper bag. The spectator, standing behind the performer, now must select a card from an entirely different deck – hopefully matching the drink inside the bag.
The audience can see that the cards where the spectator must select their drink from consist of duplicates of the prediction which is inside the paper bag. The spectator is now invited to select any card after the magician moves the cards one at a time from the top to the bottom of the deck. The audience is laughing since they can see that all the cards are the same. The spectator calls out the name of the chosen card (coke) and the audience is shocked to hear that the selected card is NOT the same as the prediction, which is a bottle of Fanta that is inside the paper bag.