Turning pretty girls ugly

This is interesting. These faces have not been altered in any way.

It's a new scientific finding called the "Flashed Face Distortion Effect".

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). This new method of image presentation, based on alignment and speed, could provide a useful tool for investigating contrastive distortion effects and face adaptation.

Read more about it here

and here