I also noticed how "Asylum" has the girl walking up the stairs backwards, which references "The Exorcist." And the killer clowns in "Freak Show," reference, Stephen King's "It." "Hotel," with its ten commandments, references "Seven," and the show itself is eerily similar to "The Shining." This all ties in to the overall theme of "American horror stories." Also every show references several different horrific true events in history that have happened, which is probably my favorite part of the show. Life is all one big "Horror Story."