The only exercism that I ever “witnessed” was on “the Exorcist”...that was scary...lol.
I’ve actually seen people be “healed” fall down and stuff. I had a guy lay hands on me once, I didn’t fall down and start shaking or anything but some did. My only reservation about this kind of thing is that I do not find this particular method in the bible though the convulsions are normal. I’d like to see more scientific inquiry into this. When Jesus cast out demons there was no great drama no great spectacle that I can find described. The spectacle instead came from the demons who implored Jesus to let them go into the pigs. Furthermore when Jesus healed he didn’t based upon the biblical reference use high drama he simply did it. I think many in evangelical circles make a mistake in confusing spectacle with power. Jesus nor his disciples can ever be accused of generating religious spectacles they demonstrated the power of a living God.
“ When He [Jesus] had come to the other side, to the country of the Gergesenes, there met Him two demon-possessed men, coming out of the tombs, exceedingly fierce, so that no one could pass that way. And suddenly they cried out, saying, “What have we to do with You, Jesus, You Son of God? Have You come here to torment us before the time?” Now a good way off from them there was a herd of many swine feeding. So the demons begged Him, saying, “If You cast us out, permit us to go away into the herd of swine.” And He said to them, “Go.” So when they had come out, they went into the herd of swine. And suddenly the whole herd of swine ran violently down the steep place into the sea, and perished in the water. Then those who kept them fled; and they went away into the city and told everything, including what had happened to the demon-possessed men.”
I’ve never watched one but there is plenty of interesting well documented events that suggests there is something to them.