Ken Norris
Dai Vernon's Favorite Things
This is a brilliantly conceived effect that fools every audience. In fact, I instantly moved this to my closer as this allowed me to address the audience with a kind of 'Snowstorm in C" story connection at the end of my show. Script it for you and tell the Dai Vernon story and it feels just like magic to your adult audience.
Martin vanishes a card which is necessary for the effect, but I found a more direct way you might consider by having the deck riffled for them to call stop or insert a finger. Then using a two-card flap make their card vanish with the deck left in their hands.
I have several MagiKraft items and am extremely happy with the quality of them all. There was one small structural issue on one item and Suzanne quick-shipped me a replacement in plenty of time for my show. Love the products and the service.