Neurologically Freaky Dollie
I saw this picture during an image search, and for some reason found it striking. The issue might be partially neurological, since there is evidence that specific brain areas track different body features, especially faces.
(There is a good historical summary of this in PDF: Charles G. Gross. Processing the Facial Image: A Brief History. American Psychologist, Nov. 2005, p. 755ff).
This might also explain why some people freak out when they see clown faces. Perhaps the facial recognition module is overly active or just plain more sensitive in these people than in otherwise normal humans. I don't have Coulrophobia, so that stuff doesn't scare me, but me dollie here is freaky nonetheless. There has also been some discussion recently on why people often find robots creepy. Perhaps it's a hybrid problem that shares neurocognitive features of both dollie weirdness and clown weirdness.