Optical Illusion - Impossible Object With a Twist
[youtube=http://www.youtube.com/watch?v=N76L4Z4ZTnk][YouTube - Link] If one looks closely at the construction of this figure, it quickly becomes apparent that something is just, well...wrong with it. ...
https://www.neatorama.com/2009/11/06/optical-illusion-impossible-object-with-a-twist/