This exhibit demonstrates symmetry in mirror reflections. A visitor stands with the edge of a large mirror bisecting his or her body. To another visitor watching, the person still looks whole because of the two-fold symmetry of the human body. The fun begins when the first person starts moving. If that person lifts a leg off the ground, for instance, the observer will see both legs lift, leaving the performer without visible means of support. Our Explainers have developed sensationally funny presentations with this simple exhibit.