Perfect Link by Kreis Magic
The performer gives a ring and a ribbon to a spectator. After the ribbon is threaded through the ring, the spectator holds each end of the ribbon. The performer covers the ring with a handkerchief, and then ties a bowknot with the ribbon on the ring. After removing the handkerchief, the performer asks the spectator to pull each end of the ribbon. Then the ring drops from the ribbon! The ribbon and the ring can be handed out for examination.