What’s a movie that disturbed you to the point that you never want to watch it again?

I saw this question on Facebook and I thought I’d ask it here. Anyway, I’ve watched plenty of movies that have disturbed me throughout the years, but the one that stands out is “Norma Jean and Marilyn.” If you’ve never heard of it, Google it.
What’s a movie that disturbed you to the point that you never want to watch it again?
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