The most unrealistic thing about this movie
I should probably start making a 'series' out of this; it's usually about a movie that has a 'fantastic' story, but then the point tends to be a relatively mundane matter.
The doctor.
What the heck is he smoking?
Theistic hysteria? Is that what a doctor would really say, even in the eighties? It's like psychiatry doesn't exist in Jack's world. If you 'hear voices', the doctors do not suspect demons or hysteria (theistic or otherwise), and they would _NEVER_ say: "I have no idea what the current thinking is", or admit that they don't know something.
On the contrary, they have a pill for EVERYthing. Even 'shyness', which is now a disease called 'social phobia disorder'. Why? So Pharma's new drugs have something to use them for. That's the way they do it; they come up with some synthetic, neurotoxic chemical concoction in their filthy labs (no matter how sterile they are, they are contaminated by enormous stains and foul stench of immorality and evil).
There's NO doctor in the world, no matter how 'friendly' (and I don't call chinese doctors 'doctors', because I don't want to insult them - to be a doctor in this world, is to be a quack. Real healers don't need to be called doctors, they don't "doct"), that would diagnose Jack as having 'theistic hysteria', or NOT KNOW EXACTLY WHAT TO PRESCRIBE HIM.
Jack would go home numbed with 'happy pills' or 'schizoid curing pills'. Jack would be also sent to a psychiatrist, and possibly a psychologist. Those nice people might lock Jack up for awhile, and of course fully 'medicated' (pumped full of neurotoxic chemicals or neurotoxins). Anything he would say or do, would be used against him to prove that he's absolutely crazy and needs more 'treatment' and 'medication' (notice how they never say 'cure' or 'healing').
Jack would become dependent on psychiatric medications, bloat to a fat, depressed, lifeless pig with empty eyes and a drool problem, and then progress into wheelchair via tardive dyskinesia (psychiatry is probably the biggest cause for becoming wheelchair-bound).
And in any case, if Jack would ever mention to anyone again that he 'hears voices', the 'doctors' would always prescribe more pills and 'treatment', and perhaps even try 'electro-convulsive THERAPY' - - old name, "electric SHOCKS".
They might also want to tamper with Jack's brains and see what sending different electric currents does to him (I've seen a video, where a woman describes the sensations she feels while the quacks poke her brain - not a pretty thing to watch, and it haunts me to this day - "That didn't feel very good." .. "How's this?" .. "That's a little better."..).
There's no way a doctor would let someone just go free, or utter the words: "I have no idea what the current thinking is". Especially because even a child knows what the current thinking is; Let psychiatry "diagnose" the "patient", sorry, "customer", and then PUMP HIM FULL OF NEUROTOXINS. And give him 'treatment', 'therapy' and all kinds of other very 'nice' things..
To me, what proves Jack to be absolutely mentally ill, lunatic, crazy, bonkers, nuts, mad and just out of his mind, is that he starts screaming about 'being possessed' and talking about 'hearing someone talk to him' in a friggin' DOCTOR'S OFFICE.
Either his world is _very_ different (and thus VERY UNREALISTIC in a movie) from ours, or Jack is really crazy.