The science trickster displays a bottle and a short length of rope. She explains that according to the ancient legends, a genie lives in the bottle. While you can’t see the genie, if you tickle him with something like a rope, it makes him mad and he hangs onto the rope. The rope is inserted into the bottle and jiggled a bit. When the bottle with the rope still inside it is turned upside down, the rope is seen to dangle unsupported from the bottle. The scientist explains that the genie is even strong enough to make the bottle float. On command, the genie releases the rope, it is easily removed from the bottle and handed out for examination.