As soon as Diana had both her feet in the receptacles...metal straps suddenly snapped over her feet, holding her prisoner there. Then the panel slid up the wall, exposing darkness...and the glint of metal. A large structure slid out from where the panel was. At first it was nothing but gleaming metal rods and wires, but eventually Diana could figure out that was a sort of robotic arm. It pressed against the floor as if bracing itself, then the end turned and extended upward toward the juncture of Diana's legs. A thick, bulbous projection of shiny stainless steel stretched forward toward her. And all the while the wires were pinching and buzzing at her breasts...