dunno, I just googled for "ballerina rotation optical illusion" and found the gif. I think whoever posted it here put three of them in a row which made the illusion a lot easier to see.
@mashton started
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dunno, I just googled for "ballerina rotation optical illusion" and found the gif. I think whoever posted it here put three of them in a row which made the illusion a lot easier to see.