A trule amazing effect from the mind of Masuda!
You spread out the deck and show that all the cards are different and that there are no duplicates. You have the spectator slide out ANY card that they want while you turn your back. The choice is completely free.
The selected card is placed in the spectator's pocket without looking, so that no one can know what the card is. You then write down his prediction about what you think the card is, and of course, it matches every time!
Keep in mind that the spectator chooses a card from the middle of the deck, with your back turned, and you still guess the card every time!