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xkcd #2914: Eclipse Coolnesss
(imgs.xkcd.com)
Alt text:
A partial eclipse is like a cool sunset. A total eclipse is like someone broke the sky.
Shadow snakes? At least that's the name I recall from Smarter every day talking to an eclipse pro/fan.
Sounded very cool, if I recall right it's a phenomenon you can observe shortly before, and especially right after, a total eclipse.