The Magician Returns (Once Again)

Riddle: A famous magician and his assistant are standing in the middle of a large, empty field. There are no trees or buildings to be seen, and there are no ropes or hidden wires attached to the two performer's bodies. A large group of curious onlookers and their families are present to see the magician's farewell performance, as advertised in the local newspapers. The magician suddenly raises both hands and dramatically shouts to the audience, "My assistant and I will now rise from this very ground and disappear from your sight, but in three hours we will reappear in a town ten miles from here!" And with those final words, the magician and his assistant slowly lifted from the ground, continuing to rise majestically, until they were out of sight! True to his word, he and his assistant did reappear in another town ten miles from the place where they had first disappeared --- in the predicted three hours' time! What a fantastic trick!! How do you think they accomplished such an amazing feat?