Endermites like to twitch (not livestream things) :o

I log back onto minecraft from about a day ago, im still in creative, I wanted to get some spawners, blah blah, I look at the endermite and want to see how it is (since its rare and stuff), I spawn it on a grass block, it starts to twitch from back to front while turning to a direction...hard to explain how that looks, sadly no video, you guys could try it out. Noone else join the lan game.

Extra stuff that might help: Regular started out survival world, lan activated with cheats, log on with cheats, I tested out the silver fish as well, seems totally normal.