An endoprosthesis for repairing and treating abdominal aortic aneurysms. The table includes two fixed foot supports for supporting the feet of the user, a tube is attached to the table, a stem is slidably attached to the tube and has two foot anchor members movable to clamp the feet of the user to the table. A liquid crystal layer, including plural liquid crystals, is inserted between the pair of alignment films, wherein the alignment films impart a given pre-tilt angle to the liquid crystals. Games may be formulated to exploit biases relating to the Monty Hall paradox.