Photo-Illustration: Vulture; Photos: Dimension Films, Disney, MGM, New Line Cinema, Nickelodeon, RLJE Films, Shudder, Warner Bros. Ask the internet why clowns are scary, and you’ll come up with a variety of answers, none of them particularly satisfying. Clowns are unpredictable , and that makes us nervous about what they have planned. (Nothing good, presumably.) Clowns reside in the uncanny valley because they look human but not quite human enough. Clowns’ exaggerated facial features make us