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Life is an Illusion - And here is some classics
Cover the bottom Van Gogh Starry Night , then stare at the top 30 sec. or so then look at the painting for - Swirly things
Is the train going towards the tunnel , or is it going from the tunnel to the station ? NO , the GIF does not reverse itself, you do.
Others at:
http://nautil.us/blog/12-mind_bending-perceptual-illusions