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The Fastest Living Thing on the Planet
I'm not 100%, but I'm pretty sure stinging cells in Jellyfish (Nematocysts) are actually faster. Wiki says they pull 40,000G, with some reports giving figures like 5,410,000G. Amazing thing is all that acceleration is caused by osmotic pressure resulting from a release of Calcium Ions.
Here is a video: http://www.youtube.com/watch?v=6zJiBc_N1Zk