First off, I am a big wimp, I just cannot handle some things.
The Talented Mr. Ripley - That horrible shocked look on Jude Law’s face just before his face and head open up in a torrent of blood.
The Lord Of the Flies (recent remake)- When Piggy is killed
I am just not a fan of beating scenes. I can’t think of anymore right now, but I’m sure there are a bunch.
I think you’re supposed to be left wondering if it was for real or not. O’Brien asked him to go unwillingly, and he refused. It’s most likely that he was faking, but since he never actually agreed to do so, no one will ever know for sure.
Spoiler warning for Silence of the Lambs
There’s a single shot of Hannibal’s cell, just after he escapes. The two guards who were feeding him are strung up - it looks as if they’ve been crucified. As a matter of fact, it’s hard to tell, because you only get a split second to see. Maybe that’s why I found it so disturbing… 90% of the ‘scene’ is in my imagination.
I’ve also been wracking my brain trying to think of the name of a film I saw once, when I was a kid. I can’t remember anything about it, except an explanation of why the main character was so stange, ghoulishly recounted by a friend. Basically, he was travelling with his dad through a remote part of Australia, when the car ran out of gas. His dad set off to get help from the big house they passed… and hours later, he hadn’t returned… and then there a banging noise on the roof of the car, over and over…
Classic urban myth stuff - the big house was an asylum, the inmates had escaped, and the banging on the roof was one of them sitting on top of the car, smacking it with the Dad’s head. For some reason, this idea creeped me out spectacularly - for years I got the shivers thinking about it. I’m fairly sure the film was of Australian origin, and that it was named after the main character. Look at it this way… I can’t remember ANYTHING about this movie except the description of the death, which I remember vividly. It must have had quite an impact on me…
Meshach Taylor geting sliced in half by the elevator cable in Damien: Omen II.
And the guy who fell through the ice in the same movie.
SPOILER: ALIEN RESSURECTION
The only “disturbing” movie death was when the amalgamated creature (half human half alien) was sucked into space through the hole in the ship. It’s not the gore, it’s the sound of it screaming, and the emotional confusion on it’s face. It was, after all, just a confused baby (yet dangerous), and it didn’t understand why it’s mother (Sigourney Weaver) wasn’t helping it. Made my brow furrow. 
I can’t believe no one has mentioned CASINO
First the scene where they literally pop a guys eye and had been tourturing him so long that he actually begs for death in the end. The eye popping was gross but the begging for death really bothered me.
The second is the end where they beat Pesci’s character and the brother and bury them. When Pesci starts crying, “He’s still breathing” While they bury the guy. That bothered me for days and I am a huge gore fan in movies.
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Not a death scene per se, but an impending death… anyway, when I was about six years old I watched a show that (I think) was called “The Earwig”. The whole show revovles around this poor mans’ experience with a bug that gets into his ear and chews it’s way through his brain. The bug finally comes out the opposite ear and it looks like the guy is going to be okay. Until the very end that is, when his physician informs him that the bug has laid eggs in his brain. The movie ends with the man screaming.
Thiry years later and I still have to pull the blankets over my exposed ears before I can get to sleep. Brrrr!
You’re thinking of “Boomerang,” a segment of Rod Serling’s Night Gallery, where the unfortunate fella with the worm in his head was the late, great Lawrence Harvey.
Worst death scene for me: not technically a death scene, since you do not actually see anyone die in it, but… the sequence in John Naughton’s Henry: Portrait of a Serial Killer wherein Henry and Otis, the two wacky, happy-go-lucky sociopaths, watch a videotape they have made of their murderous invasion of a family home. And we watch it too.
Brrrrrrrr.
In his autobiography, James Cagney states that the script didn’t specify what Rocky was “really” going through one way or the other, and that he deliberately played the scene so that it was left to interpretation.
That ought to settle things. 
Ooh, yeah! And the guy in the diving suit getting bitten in half in Deepstar Six.
:::: crickets chirping ::::
What do you mean I’m the only one who saw Deepstar Six?!
SAVING PRIVATE RYAN SPOILERS
OK, in the scene where the German is stabbing the American soldier to death, supposedly he is saying, “Relax, don’t fight it. We are both in Hell, but at least you get to leave it now.”
Still sends chills up my spine.
The Japanese psychological horror movie Cure. The premise is that random people are killing people close to them, with absolutely no reason. The killers have never met each other and have nothing in common, but their MOs are remarkably similar. Great, creepy movie.
The first murder is probably the most effective. SPOILER SPACE – Skip to next message if you plan to see the movie. If you’re a fan of the genre, you should.
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Spoilers: Towards the beginning of the movie (it might be the very beginning; I don’t remember), a guy is walking through Tokyo. Typical generic businessman: suit, briefcase, etc. He passes through a vehicle tunnel, and at the halfway point, he pauses, looking at the plumbing running along the sidewalk at the tunnel’s margin. He stares at it for a few seconds, then moves on.
He arrives at some building – a hotel, probably; the movie’s storytelling is really austere – and goes up to a room. Sitting on the bed is a naked woman: a prostitute. She sits there, patiently, while the man puts down his briefcase, takes off his shoes, and otherwise moves around the room, quietly and respectfully.
Then he takes out a length of pipe (from the tunnel’s plumbing, evidently) and clubs her really hard across the back of her head. No anger, no lashing out; he’s just as casual and unaffected as when he was unbuttoning his cuffs. The sound is understated, which makes it even more horrible – it’s like a softball getting hit with an aluminum bat: pank. She slumps over.
The deed done, he looks at her, and sits on the edge of the bed. Later, when the police come, they find him hiding in an access panel in the hallway, naked, covered in blood, totally freaking out: He remembers what he did, but he has absolutely no idea why.
The rest of the movie is like this. Really, really disturbing.
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END SPOILER SPACE.
Oh, and one more – the guy getting ripped in half by the two T-rexes in The Lost World. I sincerely don’t know how that skated by with a PG-13 rating.
I watched** West Side Story **as a youngster and I thought, really thought they were going to go Somewhere. Someone points a gun, kid goes down, happened so fast and he is dead.
But when they try to take his body, Maria screams “don’t you touch him” and throws herself on top of him, recovers herself and gets up with dignity and walks.
I still hate to watch that.
I’ll have to second Dancer in the Dark. The first death scene was the worst, I think, mostly because right after the littlee boy is riding around singing ‘you just did what you had to do’ The second death scene left me with such a sad feeling that I felt wrong for days. It is the saddest movie I have ever seen in my life and I recomend it to everyone here. I have so much respect for Bjork as an actor, it is a shame that she says she will never do it again. Hopefully someone can convince her otherwise.
peace,
JB
There is a near forgotten movie from the 70s called Looking for Mr Goodbar starring Diane Keaton. The final death murder scene is so brutal and realistic it haunts me to day. The strobe light that slowly stops flickering and locks on her face.
Mine is somewhat different from everyone else’s - the interrogation scene of the real/second Valentin Mironov in The Good Shepherd, followed by his death by jumping out the window, really bothered me for some reason. Besides that, I never really liked the movie anyway.
Walking Dead’s Negan’s bashing of Glenn’s head with Lucille…much worse.
I missed this thread the first time around, but when I read the title, Looking For Mr. Goodbar was the first movie that came to mind. I’m surprised you were the first to mention it.
The third film is the only one I ever saw, and I remember nothing of the film except for that scene. My wrists still hurt thinking of it