You may well remember that japanese guy's gif of a dancing ballerina:
Does she turn clockwise or in the opposite direction? The answer is at the bottom of this post.
Next one is called «Impossible Motion: Magnet-Like Slopes»:
Anamorhic Illusions:
The "Moving" Corridor (static picture):
The Violet and the Green Waves (static):
Amazing T-Rex Illusion! Just laugh at this:
The "Moving" Particles:
Yes or No?
And, finally, the ballerina (but is she not just a young woman and maybe naked ?) part:
Enjoy;)