A Clockwork Orange always makes me think new thoughts.

Fried green tomatoes at the whistle-stop cafe

The grudge

the old version of Handmaids Tale, with Duvall. creepy.

the Bothersome man....stayed in my head a long while.

Donnie Darko.

The shining...

(No mention of David Lynch films? This is no cinema discussion! I'm outta here.)

Mulholland Drive is probably his more famous film about this topic. But more so The Lost Highway. Both films present how, for some of us, our minds cope after a traumatic experience.

But those are just for real mind zingers - when you go WTF after watching them.

Ex Machina was the film that stuck in my head days after seeing it. The Turing Test isn't about whether an AI could pass for human. But whether it could while you know it's AI.

Watched the original Phantasm entirely too young. Think about that movie every time I visit a cemetery to this day. Nothing recently has had that effect. :-/

Brazil. Certain aspects of that movie still haunt me to this day.

The original Star Wars.That got me thinking about forces being neutral, depending on how you use them.
I, and several members of my family, were born psychic, so we knew that "God" wasn't the one doing the stuff we could do (water witching, ESP, seeing the future, etc.) since it came naturally, from birth, and had nothing to do with "religion."

When I first saw Blade Runner soon after it came out. What really got me was the sci-fi film noir that was juxtaposed with the hauntingly beautiful soundtrack by Vangelis. And then of course many years later came the Director's Cut! Mind blown again. Vangelis refused to release the soundtrack for many, many years,as he did not want to be heard outside the film.

Full Metal Jacket!

Eyes Wide Shut.

Boys Don't Cry -- the rape scene is seared onto my brain - unfortunately. Hillary Swank did such a good job.

Alien

It's the only movie that has ever given me nightmares.

Apocalypse Now.

And West World!

Paul Blart Mall Cop......paid for it and saw it in a theatre. Took me a couple years to gain the strength to go back for fear of another Kevin James movie.

Andy Warhol's Frankenstein (original title: Flesh for Frankenstein) and a sequel about Dracula. Wow - very disturbing for back then.

I saw Requiem in passing when I was younger. I'll have to watch it again. If you want to see more "weird" stuff from Aronofsky then watch "mother!". It's actually a perfect discussion piece for this group because it's based on religion. I thought it was tripe.

I can't think of any movie off the top of my head that messed with me that much though.

I can't watch Requiem For A Dream...I never was interested in heroin or any other addictive drug...but most of my friends have had habits of one of them at one time, and quite a few didn't make it back...but the Grandma in that....hits home.

Back in the day, Event Horizon, the Mist, the Thing (1982 version) and Akira. More recently, Tree of Life, the Void, and the Hallowed.

The Exorcist scared the crap out of me as a kid.

After I saw THE EXORCIST, I slept with the lights on for days (nights?) and even then, uncomfortably. Reading through the thread, I learn that I wasn't the only one...

manufactured landscapes. a documentary available on national film board of canada about life in china and bangladesh. truly frightening