Perfect for kids shows and beginning magicians.
The performer shows a magician on a card with a hole in it. The performer places the magician in a "locked chamber" envelope. For extra security so he doesn't escape, places a pin through the chamber and the card.
The magician vigorously pulls on the on the magician card, showing he is securely locked in.
With one quick pull and a magic word, the magician card somehow "escapes" the chamber unharmed with the pin in place!