8 Card Brainwave  cards and video download $12 Inc Post Worldwide
A spectator is given a free choice from eight face-up cards and it's place aside. The remaining cards are turned over to show that they all have blue backs. The spectator turns over their card and it's the only one with a different colored red back
For More Great Tricks from the  Wonder Magic Factory  go to the  Wonder Magic Factory Website - or select “Magic Factory “ in the Seller column at Snappyhunt Magic Market Place