Yikes!

 

It's called pareidolia (from Wikipedia):

"The term pareidolia, referenced in 1994 by Steven Goldstein, describes a psychological phenomenon involving a vague and random stimulus (often an image or sound) being perceived as significant. Common examples include images of animals or faces in clouds, the man in the moon, and hidden messages on records played in reverse. The word comes from the Greek para- — beside, with or alongside — and eidolon — image (the diminutive of eidos — image, form, shape). Pareidolia is a type of apophenia.