Still pictures that move
Sunburst
Look around the picture, not at the middle. Does it move?
It seems to pulse and turn, though it is still.
Why? Every petal shades softly from dark to light, the same way round. Your eyes take the shading for movement, out of the corner of your eye.
Picture: Cmglee, CC BY-SA 4.0 · Wikipedia(opens in a new tab)