Like body-swiping demons, exorcism movies simply refuse to go away. The latest one to take possession of the multiplex is 'The Devil Inside,' which premieres this Friday, and which is just one of several that will open this year. You may think you know all about exorcism movies, since you've seen 'The Exorcist' (the 1973 classic by which all other exorcism movies are judged), as well as all the documentary-style possession-and-expulsion chillers of recent years. But you may not know about the forgotten Jewish exorcism tale that launched the genre, or the apparent curse that afflicted 'The Exorcist' both during production and after its release, or the truth behind the real-life exorcism stories that inspired many of these films. Read on, if you dare, for a history of the horror movies that will make your head spin.