2.. spooky for 2D.

All those optical illusions that make a 2D picture look like a cool intelligent video....
I believe no picture is a picture, our mind creates a small video of length (+/-) 'dt' amount of time. This is why a picture of a smile or a cry means a lot to us. But just for once, try to think that the person posing in that picture has deformed his face into a certain fashion. [laugh/cry] ignore the fact that you know what those emotions are. It starts to feel so stupid about the charming model.
   In these kind of pictures, the movement in eyeball is the key. one may observe that the spooky action increases when we hover our eyes over the picture. We will be tricked to think that the movie has moved somemore frames. With my little practice of meditation, given some time I am able stop this thing. try raising your face towards ceiling and see the picture through your barely open eyes the motion appears to come rest. this is simply because that the eye movement will be very minimum there.