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The classic effect in which a volunteer simply thinks of any card and it is found not simply to be the only face up card in a face down deck, but when turned over, it's back is shown to be a different color from the rest of the cards! Not only is Big Guy's Brainwave deck is created a little differently from others, allowing for a much smoother presentation. If you enjoy performing The Brainwave Deck, we believe you'll really enjoy these. And if your Brainwave Deck is collecting dust because you've had a hard time making the presentation look natural, try it with these: you'll be pleasantly surprised.