http://www.youtube.com/watch?v=eN0Hk-9Drm8

The school of hang gliding where the video shows a tow by an
electric motorcycle. Manfred Ruhmer pulling Ennio Favero for a demonstration at
the landing field of the Delta Club Laveno.

Manfred would be right next to the pilot and with a quiet electric
bike should be able to speak to the student. When Manfred stops the line is no
longer pulling the pilot and the pilot goes out ahead of Manfred.