Borrow a deck of playing cards and have the spectator shuffle them. Ask your spectator to choose a card from the deck and show it to the audience. Return the card to the deck and prepare the audience for some amazing magic. Place the deck back into the card case, and at your command, the selected card magically rises up from the deck and out of the box. Your audience will be amazed since it is a borrowed deck that is immediately examined and returned to the spectator.