The magician shows a deck of cards and states that it contains two predictions. A card is freely chosen (really!) and hidden. Nobody sees the face of the card (magician or spectator). The magician then runs through the deck and removes his two prediction cards, which he says will reveal the value and suit of the selection.
Let’s say the two cards are the Five of Spades and the Queen of Diamonds. The selected card is turned face up. It is the Eight of Clubs – no relation to EITHER prediction. The experiment appears to have failed… until the Five and the Queen are turned face down.