This gif will revolve either clockwise or anti-clockwise, depending on your thought process. Play with it and have several people look at it at the same time and you will be amazed to discover that it will be going different directions for different people. I can change the directions of rotation by thinking mathematical equations or flowers for my wife.
Four people watching her rotate. Sometimes, we see her the same. She'll change direction for some, but not others, yet the direction change doesn't occur at the same time for any of us.
Weird.... Yesterday while working on my resume, I saw her Counter Clock Wise.... Today, just being me, she keeps going clock wise... Started doing what you said...Math...and she turned counter clockwise again?? Fun!
It is actually a perception of your thought process and there are no common reasons for it to change connectively.
Cool. At first she was turning clockwise for me regardless of thought processes but then I noticed that if I was looking past the monitor at something else and seing it in my periferal vision she went counterclockwise and part of the time if I looked back it would change back by the time I focused on it but it seemed to stay moveing the same way for how ever long I continued to look at it and only changed if I glanced away and back.
Check the shadow of the foot, that will tell the truth. Beyond that, I can see it either way I want, and at will.
That's amazing,flowers,math....think with my Orange cheetoh stained Johnson she stops, smiles and moans seductively!!!