As Many As You This mathematical trick can be performed with any pack
Effect: You riffle the deck and wait tell the spectator tells you to stop you stop and take away the upper portion. Then the pick the card up look at it then put it back. You square up the deck and riffle the deck to your ear. Then the deck tells you what their card is. (A BIG STUMPER)
O.K. take a look at the top card before anyone knows about it. Best way is to look at it while you shuffle the deck.
Now hold the deck in your left hand with your thumb on the right and your other fingers on the left. Then with your right hand with your thumb on top then with your four fingers on the bottom. Now with your thumb on top riffle the deck a little and ask them to tell you when to stop. When they say stop pull apart the top portion away while that happens with your thumb on top of the deck pull the top card down to the lower portion. Tell the spectator to pick the card up and memorize it. Place it back and then square up the deck and riffle the deck toward your ear. Then tell them it is your card. They ask to do it again. But say once is magic twice is entertainment.
WARNING!!!- Don't do this trick in front of the same audience twice.