The strange apparatus Yoko uses really exists! Roger Leloup, specialist in this area, used an exact copy of it in his drawings. In the series he made with Tillieux, He only permitted himself some minor modifications, mostly in the way to fixate, to compmy to the scenario. The scientific name for this machine is « EXOSQUELETTE ». Created by the cybernicians in the labs of Cornell and General Electric, it works thanks to an ingeniuous system which allows a human to lift 1000kg just like it were an apple.