The ZIG ZAG ROPE is an amazing close up magic miracle. Take a close look at the white rope which can come out of the magic box. When you push the box sideways the long rope magically hides and reveals a secret set of ropes that are hidden. These ropes look as though they are now cut.
Using your magical powers you now push the box back into position and you can remove the rope to show it is not cut and magically restored.
The illusion and trick is similar to the sawing in girl illusion. The principle is very similar.