there are well over 100 known disorders that could manifest in "possession-like" symptoms. I'll look a couple up for you if you'd like me to. I'll go ahead and throw schizophrenia out there. I can't tell which mental disorder the person in the op suffered from; neither could a trained psychologist. It's a low quality sound clip from years ago. As I said before, there are loads of disorders that uneducated, superstitious people would call possession. Epilepsy was once thought to be caused by possession. If you'd like to define possession and its symptoms, i'd be happy to examine it from first principles and tell you my thoughts on what it actually is. I don't mean that in a condescending way either, I'll actually do it. Same with the "almost impossible" things. You're right, science can't prove that there are not devils taking up residence in peoples' brains. You see, science is a methodology in which knowledge is built by comparing ideas or predictions to objective reality. So, if someone says that possession is caused by a devil or demons, they are making a positive truth claim about reality. Because they are placing the devil or demons in the realm of reality, we are able to compare the prediction of possession being devil-related to what is actually observed. Now, we have a lot of technology and knowledge to analyse the brain, what have we found? Well, there is no evidence whatsoever of demons or devils in there. Does this disprove the prediction? no. does it support the prediction? not at all. What this does is put it in the same category as predicting that the loch ness monster causes parkinsons. Now if you'd like me to disprove it, we can do it through logic.