From verso of card: "Prepare by tying to a spoon a long black thread which must be passed through the keyhole of a convenient door or cupboard. Now let your audience enter the room, but don't let them stand too close to you. Placing the spoon in a mug, announce that you can make it dance to a tune. Now whistle a jolly air, and the spoon will begin to move, slowly at first, then quicker, until it is in rapid motion. Your accomplice, behind the door, will do all that is necessary."