Olympic Vision Effect: Each of your 2 spectators gets half a deck of card...
The Effect: 12 cards are placed on the bar (using any red and black cards from the deck) in the same pattern you see in the diagram below here. You tell someone to secretly pick any BLACK card. After telling them to make several secret random moves, you are able to tell them which card they have moved to.
The Secret: Tell your audience member to pick any Black card. Tell them to next move UP or DOWN to the nearest RED card. Next, tell them to move LEFT or RIGHT to the nearest BLACK card. Next, tell them to move DIAGONALLY To the Nearest RED card. Finally, tell them to move UP or DOWN to the nearest BLACK card. If you follow these directions carefully, your audience member will always end up on the MIDDLE CARD ON THE BOTTOM ROW.