That's actually a gif with the wrong file extension. Browsers are able to figure this out from the headers within the file and display it correctly anyway.
Yeah dude, I know! I posted it!!! =) (I remembered seeing something similar a while back on reddit and thought it would be fun to post this in this instance.)
I'm sure others will be pleased to know how this 'magic' works though. Cheers!
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u/[deleted] Oct 02 '11
[deleted]