A bill or a currency note is borrowed from a spectator, folded, and dropped into a sealed clear crystal box through a slot on the top. Hand the box out to the spectator, and he will not be able to open the box unless he learns the clever secret. But you

A red wooden ball is placed into an empty glass tumbler. The glass is then covered with a handkerchief. The performer pulls the handkerchief downwards, outside of the glass. Suddenly, the red wooden ball starts penetrating