You can simulate one of these yourself by getting a wide flexible plastic mirror...

raimondious on Dec 20, 2012 | parent | context | favorite | on: Math Professor Invents Non-Reversing Mirror

You can simulate one of these yourself by getting a wide flexible plastic mirror (dimensions along the lines of 1:4) and bending it to be concave until you look undistorted. Looking into this bent mirror, if you raise your right hand, the hand on your left side in the reflection will move.

jlgreco on Dec 20, 2012 [–]

Perhaps even easier is to secure two flat rigid mirrors at a right angle, like: /\