The Spinning Silhouette |  | | Uploaded by Alnitak 2 years ago.
photo dimensions: 300x400.
photo size: 208918 bytes.
The dancer is a 2d shadow so there are no tricks: it's not changing direction.
It depends on how your brain is seeing it... you could be able to see it clockwise, anti-clockwise or both.
You can also see it as a test. Here are the results:
http://www.news.com.au/heraldsun/story/0,21985,22556281-661,00.html | |
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