I saw this about a year ago at a show I went to. The magician had a deck, in the box on the table in full view the whole time. One spec named a card, another named a number, and a third dealt down the card to the selected number, which was of course the chosen card. The kicker was that all of the other cards were blank faced cards. I know this isn't the CANNABIS effect, does anyone know what the name of it is called?