I feel like I have some uber-rare disease that no one has heard of and I have finally come across a support group on the net! I finally found this title by asking for an answer on an "experts" site on the web. I too, saw this movie in my youth and was struck by the atmosphere and especially the ending. I have never forgotten it and have never seen it since. No one I know saw the film and I had almost given up on ever finding it's title. Alas, even knowing the name, I shall probably never see the film again as it is impossible to find commercially. Small steps...
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