its so crazy and very cool: cats do two things to make sure they land on their feet.
1) they fix their eyes on where they want to land and never take their eyes off of it.
2)they tuck their limbs in to move faster and stretch them out when they want to go slower.
apparently squirrels do the same thing.
they do this all in around 300 milliseconds, and the blink of an eye is about 600. crazy cool, eh?