On Your Mark

Effect: A selected card is located within seconds.

Secret: With a soft black pencil draw a diagonal line down both sides of a pack of cards. When you show the trick, you remove the cards from the case and ask someone to take any card, remember it and return it anywhere in the pack. Pick up the pack and look at your pencil mark. At one point there will be a small back mark out of alignment with the rest of the line – that is the chosen card.