Rodney Ascher's documentary Room 237 recieved a lot of positive buzz at this year's Sundance Film Festival. That film explores Stanley Kubrick's 1980 film The Shining from multiple individual's perspectives and theories. One of his previous films, The S From Hell, also explores an old and terrifying bit of popculture terror: the 1964 logo for Screen Gems, which would show up to momentarily terrify young audiences of The Flintstones and Bewitched.
The film is a successfully creepy blend of horror and documentary, and looking back at some of the things on television that scared me as a young child, I can sympathize with the adults interviewed here. Not only do we get a breakdown of what the logo is and how it was made, but we get some stories on exactly how and why it managed to be a nightmare-enducing "embodiment of pure evil."
While you wait for Room 237, check out The S From Hell. It's available for free streaming on Vimeo and runs a brisk 9 minutes: