In this effect you have a skeleton which is placed within the case and at one point you have a sword which is placed in the center section of the skeleton. This is an impossible effect of dividing the skeleton into three parts and then restoring it! This originally came from Georges Proust Academie De Magie in Paris. The illustrated instructions that accompany are in French language. Also included are three pages of illustrated instructions of the Zig Zag plus which will give you a good idea of working. Also included in English.