Probably. The real thing isn't like that at all. The type of thing that you don't do on a stage.
Iam certain that you are correct...However, i wanted to show how easy it would be for people in an audience to be hypnotised even "before" coming onto the stage, due to hypnotic suggestibility…
IF the "exorcist" was a fake, he would use the hypnotised person on stage to behave in the manner of a person that is possessed by some demonic identity, which in turn makes the audience believe that what is happening is a real exorcism..