If you look intensely at these black bars, you will just see black bars. But if you shake your head, you will see an image. See? No. Shake it again. Yes? OK. Have fun until you get a headache.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/7um6pI7R_ng/shake-your-head-optical-illusion-will-require-aspirin-afterwards
PLANAR SYSTEMS PEROT SYSTEMS PALM
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