via Mighty Optical Illusions http://www.moillusions.com/2013/07/floating-sphere-optical-illusion.html
Crafty Puzzles
Scrolling this image up and down, or moving your head simultaneously while observing the sphere produces an interesting optical illusion effect – a floating movement of the central object. Simple as that. Be sure to browse through our #animations category for more similar stuff!
Crafty Puzzles
