I use it face down as a prediction card then I do a simple cross cut force of the 7 of Spades after
predicting that the card the spectator will be double the value of my face down prediction. When the
spectators see the 7 of Spades I act as if I messed up - then I turn over the 3 and a half of Spades
and it always gets a surprise and a great laugh. Nobody expects it. Great fun.