I'm doing research on alleged testimonies and evidences of the Spirit Realm. In particular, I've been lately reviewing testimonies and live recordings of exorcisms. In doing this research I came across a few live recordings of exorcisms which I find particularly impressive. I say impressive because in my opinion the exorcisms look quite convincing, and I lack the expertise in psychology and neuroscience to provide a proper materialist explanation for them other than assuming that we are watching paid actors showcasing an awesome performance.
Common patterns are that the allegedly possessed person seems to switch personality (as if the alleged entity's personality is taking over), sometimes the exorcist and the alleged entity establish conversation, sometimes the person starts to "throw up" the alleged entity out of their body right before full deliverance is achieved.
The videos are relatively short, so I encourage the reader to watch them to understand what I'm talking about.
Here are the videos:
What is the psychological explanation for exorcisms?