Dee Septor, The Famous Magician

Dee Septor, the famous magician, claimed to be able to throw a ping-pong ball so that it would go a short distance, come to a complete stop, and then reverse itself. He also added that he would not bounce the ball off any object, or tie anything to it. How could he perform this trick?

Answer

He threw the ping-pong ball straight up in the air.