That reminds me of this one show I was watching, it had this guy who believed he was being attacked by demons while he was sleeping. He'd be asleep and then he'd suddenly feel something grab his leg or something to that effect. So afterweeks of sleepless nights living in fear he finally called a priest to do an excorcism. The producers of the show rigged the hotel room with tons of cameras and microphones, and then let the guy go to sleep. Sure enough, he was sleeping and then all of a sudden he bolted up, and the set crew came in to talk to the guy. They brought the priest in, and he started his little excorcist speach, "...and so leave this man in the name of Jesus Christ!"

A few minutes later they went to check the recorders to see if anything odd had been caught on tape. They were listening to the audio recordings, and everything was normal. It continued on until it reached the part in the tape when the priest mentioned "...in the name of Jesus Christ!" Suddenly, there was the scariest noise I had heard in my entire life, a hideous screaching, like something straight out of a horror movie. I'm not religious, but this scared the crap out of me so much I quickly said a little prayer. It didn't help that I was home alone and it was after dark. Man did I have trouble falling asleep that night...