The craziness surrounding this movie didn't really happen on set, but the incident is insane enough to merit a spot here. In 1976, on a Friday the 13th, no less, the set designer from the film, John Richardson, and his assistant, Liz Moore, were involved in a car accident in Holland. Richardson survived, but Moore wasn't so lucky - she was killed by decapitation, much like one of the movie's characters—a death that was designed for the film by Richardson himself.

Even crazier, a sign nearby the crash site read, "Ommen, 66.6 KM". Chills.