SO STRONG, it had to be BLIND LUCK!
A spectator freely chooses one of two decks, red or blue (not a force). The other deck is set aside. From the chosen deck the spectator reverses any card sight unseen. The deck that was placed aside is now spread on the table by the spectator. Amazingly, the exact same card is reversed in this deck! BUT THAT'S NOT ALL...
The two cards are turned over to show that not only do they match, but each card has the back design from the opposite deck!
What You Get
BONUS! THE ZARROW SHUFFLE -- Expert tips and instruction for a sleight that in Dan's opinion is the best false shuffle of all time!