InstruMental | David Jonathan & Nikolas Mavresis JT Each head card in the

Each head card in the picture has a different body shape

via countless real-world performances

Undercover - A blank card placed into a transparent folder changes into a previously selected card

but are no less effective:

InstruMental | David Jonathan & Nikolas Mavresis JT Each head card in the"InstruMental is the sweet sound of fooling everyone in the room! It's devious, fun method is something I have never seen, or should I say heard, before. I love it!" Victor Sanz "I was floored when I first saw InstruMental and was almost in disbelief when I saw the method. This is an incredible, practical, devious effect that is easily one of the cleanest smartphone predictions out there. I am super excited to begin performing this immediately!" Judah