The Magician shows a colored ball and drops it into a paper bag NOT shown previously empty. Claiming extraordinary powers he states that he will change the ball’s color.
Making a magical gesture over the bag, he removes a ball of a different color and tells everyone that it is the original ball. Stating that the process is reversible, he returns the ball to the bag and with another mystic pass removes a ball of the original color. This is repeated as the audience expresses that the performer has been switching the balls and that there are really TWO in the bag, not one.
The performer admits this is true but explains that the second ball has nothing to do with the magic. He removes the “extra” ball showing that it is a golf ball!