An eye rolling around in the darkness, looking like something different when they're closed, squiggling almost excessively at different parts of the animation... the main part of the animation was definitely a creative twist though. XD Reminds me of that one horror movie I can't recall the name of right now... but maybe you had that one as reference? Something about a creature hiding in the shadows; coming closer whenever the light turns off, until suddenly...
Anyway this was a pretty creative twist on that film if it was, and if not: I'ma have to dig up the reference so you can see the similarities! Good stuff.
-cd-