The terrifying tale of the exorcism of Anneliese Michel resulted in the death of the 16-year-old, and also served as the inspiration behind The Exorcism of Emily Rose. Michel led a normal teenage life until she came down with signs of epilepsy. When her parents took her to a psychiatric ward, her condition only worsened.
Michel claimed to see demon faces everywhere she looked, something likely exacerbated by her deeply Catholic upbringing. She developed an aversion to holy objects, and suffered violent outbursts at random.
Since Michel's "possession" occurred in 1973, shortly after The Exorcist terrorized filmgoers everywhere, requests for exorcisms rose exponentially. Though the Catholic church denied Michel's parents' request for an exorcism, two priests did eventually agree to perform one.
Needless to say, the exorcism went horribly wrong, and in the end Michel refused to eat at all. As a result, she ended up dying of starvation, leading to criminal charges brought against her parents and the priests.
Watch the video below for details on a true incident far scarier than anything you'd see at a theater near you.