What's the scariest movie that wasn't intended to be horror?

What's the scariest movie that wasn't intended to be horror?

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if i saw this at night walking through the woods i would literally find a black cock and suck it

does Zodiac count as a horror movie?

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THE WORK OF ONE WHO CONSORTS WITH BEASTS!

I dont think Ive ever seen a single movie that TRULY made me scared. Name one (1) for me Sup Forums I dare you

Return to Oz

Every day retarded 90's born faggots post about movies that "really fucked them up" You all disgust me.

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That's a pretty good answer.