Giant Brainwave Deck

Any card is named - no force. You then remove a giant deck of cards from its box and fan the cards. There is one card face up in the deck - it is the spectator's freely named card! You further prove that you knew the card to be selected in advance by showing that spectator's card has a different colored back than the remainder of the deck! The Paul Fox/Dai Vernon creation made in giant Bicycle Rider Back cards. Very good condition.