Most noticable in savanah and clay mesa regions, creepers appear to walk towards player backwards, sheep move backwards, chickens move backwards, and zombies move backwards. They seem to walk more on a 45 degree angle backwards rather than directly facing/opposing, and the movement of the legs seems opposite of the direction travelling, hence the appearance of micheal jackson moonwalking .behavior.

Have not encountered mobs in other regions enough to see it is consistant