The magician/mind reader introduces a pack of ESP cards.He shows the backs & faces of the cards freely & lets a spectator select a card and place it face down on the table.The spectator is then instructed to cut the entire pack into half which in turn is further divided into 4 face down piles on the table.The volunteer is now asked to show everyone which symbol of the ESP deck he has chosen.Say it is a Circle.The four face down piles on the table are now turned face up.Surprisingly all the face cards of these face down piles bear the spwctator's chosen symbol(in this case Circle)! The performer now spreads all the other cards on the table & every card now has "Not your card" written on them!