The Ninth Configuration. 1980.
A castle that is used for a mental asylum for soldiers, psychiatrist Kane lets the inmates act out their fantasies but is unsure what is real and what isn't.
Based on the book by William Peter Blatty, will admit this was a intense read and didn't want to put the book down. Classed as somewhat sequel to The Exorcist, but has no ghost, demons or possession even though Jason Miller makes a appearance as a different character, it does focus on a party guest from the film, the one who Ragan says "your going to die up there before she marks her territory on the carpet.
There is some good acting from Stacey Keach, Scott Wilson, Ed Flanders, Neville Brand, Moses Gunn who comes dressed as a Superhero. This does have a great atmosphere around it, a castle in the middle of nowhere with a thick mist surrounding it. Blatty does his usual while writing a serious movie adds in some comedy that doesn't go over the top and is done a tastefully. Right from the start to the end this was basically almost had me from the edge of the sofa to the floor.
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