Shake It Fast

Ever notice how dogs shake themselves dry after a bath?  Turns out there's a science to the dance and nearly all dogs (and bears) shake at a similar speed: about 4-5 times per second. And, the smaller the animal, the faster they need to shake; I've never had the pleasure of watching a rat dry itself at 18 Hz until now.

 

 http://www.youtube.com/watch?v=kvoKN1UfLn0