Fullscreen this video and follow the directions.
Our brains are full of such bugs, being the product of evolution rather than design. Is it that your brain is layering their faces due to them flashing by so quickly? Or is there something haywire with our facial pattern recognition in our peripheral vision? I saw lots of cyclopses, goblins, and at least one pointy-toothed underbite. Scrolling through the video again, I saw nothing but normal girls, mostly without makeup.
Hat tip to @richardwiseman.