Nothing but the Truth (DVD and Gimmicks) by Cameron Francis and Big Blind Media

A killer, self working packet trick that comes with 5 specially printed USPCC gaff cards."Incredibly awesome effect that I highly recommend you purchase." 4.5/5, -Jeff Stone, Magic Reviewed.comA card is selected by a spectator and hidden away. The magician (that's you) then reaches into their pocket and retrieves a state of the art Lie Detector machine. (Ok, it's actually a small packet of beautifully printed cards that you carry round in your wallet or purse).A series of questions are asked of the spectator. "Is your card red or black? Is it a spot card or a court card?" - That kind of thing. The spectator can choose to honourably tell the truth or fib like an incorrigible scoundrel.Each answer is 'input' into the lie detector (by placing one card from the top of the packet to the bottom for each letter of the random response), and the new top card is flipped face up. Incredibly this reveals either the word TRUTH or LIE (depending on whether the spectator was honest or not)!Through t