This is an amazing optical illusion

[Jim H - VA USA]

This one doesn't quite seem to work for me.

If I am looking away, at something else, and this is at the corner of my vision, I get a faint sense of seeing something moving there but if I look directly at it—nothing.

A big screen seems to be necessary for this one. I just tested it. A cell-phone sized picture did not work for me either, even when I looked around the image.

It's pretty neat on a big (computer) screen.

 

[Jim H - VA USA]

"Stepping feet" motion illusion.

Both the yellow and blue rectangles move at constant velocity, but it appears they the do not. Quite striking...