Director Bob Clark is best known for creating the holiday classic A Christmas Story, but most people don't know that he was also responsible for a much darker holiday classic as well. The type of holiday classic that is less about Christmas and more about a sorority house full of innocent college girls and a very strange killer hiding in the attic. Black Christmas is not only an important film in the world of Canadian horror, but it is now regarded as a classic of both the Christmas and the horror genres, as well as a major touchstone in the slasher genre as we now know it.