Performer announces he will take his audience backstage and show them how a trick works.
He turns his back to the audience and apparently performs for an imaginary audience in front of him. He picks up a thin tray draped on three sides and holds this with the undraped side to the real audience. Two thin boards are next displayed and inserted upright on small blocks attached to the tray. Picking up a GIANT card he drops in between the two boards. It drops clean through the slot in the tray and comes to rest in tape loops hanging beneath the tray, as audience clearly sees. Performer now removes the boards, displays them freely to his imaginary audience and takes a bow.
Now the magician faces his real audience and explains that they have just seen a real mystery from backstage. He then suggests that they might like to see it performed in the normal way. The trick is repeated facing them. This time they are really fooled as the performer really makes the card vanish completely...only to re-apppear across the room!