Sal's 4,5,6 packet trick

The magician has the spectator to shuffle the deck and cut it into 4, 5, or 6 piles. The spectator then picks up one of the piles and simply thinks of a card that was in it. He then puts all the piles back together in any way he likes and gives the whole deck a cut. The magician then shuffles the deck and throws 1 card out onto the table and it just so happens to be the spectator's thought of card!