Check out this cool optical illusion called “The Flashed Face Distortion Effect”. Please note that the faces featured in the video have not been altered in any way.

We describe a novel face distortion effect resulting from the fast-paced presentation of eye-aligned faces. When cycling through the faces on a computer screen, each face seems to become a caricature of itself and some faces appear highly deformed, even grotesque. The degree of distortion is greatest for faces that deviate from the others in the set on a particular dimension (eg if a person has a large forehead, it looks particularly large).

You can read more about the phenomenon right here and here.

[Via Geekosystem]