Bicycle - Shared Deck - Red Back

The magician shows a diagonally cut deck of cards. By spreading the two halves of the deck on the table, he demonstrates how completely different the cards are. The cards are turned over, and two spectators are asked to each select a half card from the deck in front of them. The two halves are brought closer together, and it is shown how the backs fit perfectly. When the magician turns the two halves over, the fronts also magically fit together, forming a complete card.