For example, when a magician performs the "Brainwave Deck" trick, he first shows the audience a deck of cards with blue backs, then asks a member of the audience to think of a card, and then asks them to call it out-for example, the ace of clubs.
好比說，當魔術師表演「心電感應撲克牌」時，他先將一副收在牌盒中的藍色牌背撲克牌展示給大家看，然後要求某位觀眾心裡想著一張牌，然後請這位觀眾把心想的這張牌說出來，例如：梅花 A。