Flashed Face Distortion Effect = Caricature Effect
there's this animation spreading on the web:
Each person's face becomes a caricature.
Here's each image of the frame.
Why Does it Happen?
You don't need fancy explanation from neuro-psychologists.
This effect happen simply because you are not looking at the face directly (aka peripheral vision), and only for a fraction of a second.
You don't have full info. So, your brain constructs the most outstanding parts of a person's face, as in caricature, where facial features are exagerrated.
Just try to look at any photo of a person's face, but don't look directly, look at a point outside the picture, and you'll get the same effect.
The original source that inspired this animation of celebrities seems to be: [Flashed face distortion effect: Grotesque faces from relative spaces By Tangen J M, Murphy S C, Thompson M B, Perception 40(5) 628 – 630. At http://www.perceptionweb.com/abstract.cgi?id=p6968 , accessed on 2013-09-22 ].
here's one of the animations from that article:
(if your browser doesn't display the video, right click and select 〖View Video〗)