A deck of cards is genuinely shuffled by both the performer and a spectator, who then each select a card. These cards are lost back into the deck which is, again, shuffled.
The magician announces that despite all the shuffling he is convinced that the spectator's card is 'fourteenth' down from the top. With a flourish he reveals the fourteenth card - it IS the spectator's selection.
So far so good. But here is where iCaan moves into miracle territory. The magician names their selection (let's say 'Three Of Clubs') and asks the spectator to guess at which numbered position this card lies in the deck.
Whatever their answer, the spectator is told to take the deck and deal down to that number. The magician DOES NOT touch the deck. Impossibly the magician's 'Four Of Clubs' is found at the exact number named by the spectator!