Possible Spoilers...Movies with twist endings you didn't see coming

[Fausto]

Happy Birthday To Me had a total Scooby Doo type twist a the end.

"And I would have gotten away with it too, if it hadn't been for that b%$# from little house on the prairie!"

[wickednick]

Fight club definatly
Feast 3
Sixth Sense
The Mist

[peter johnson]

The mention of Diabolique -- which is great, by the way -- made me think of a similar film that I also didn't see the electric shocks and psychic surprises coming in:  Ingmar Bergman's "The Magician".  Bergman is a funny guy -- he championed atheism and reason throughout his life, but was never comfortable with his own position, and strongly suspected that mystery and the supernatural was just around the corner waiting to jump on him or observing him from a distance & laughing at him --

peter johnson/denny crane

[skuts]

I also didn't see the ending of The Mist coming.

The end of the Mist was not part of the original story. It was just Darabont (sp) masturbating.upon and ruining what would have been the best King adaptation ever.
I edited my dvd copy to remove his spooge and restore the story to it's former excellence.

[feiyen]

The Village though all M Night Shyamalan movies are like that except Lady in the water.
Blade Runner
Fallen
Star Wars (if you lived on a deserted island and knew absolutely nothing about it) I mean think about it it makes sense.

[oxode]

The Original SAW definitely had one of the better twist endings that I've seen. 

Bah, humbug! I was angry about that. Do they expect me to leave my brains at the entrance? A man deadly ill lying on the floor, playing dead for hours a few steps away from a doctor? Did You ever try to pretend You're dead? If You manage 10minutes You're good.

[Flick James]

Interesting thread. I've been able to see some endings and not others I think based more on the state of mind I was in at the time, and things like maturity as well. When I first saw Angel Heart (1987), when it came out, I didn't see it coming, but if I had seen it years later with a more mature (and jaded) mind I probably would have figured it out. I did not see Jacob's Ladder coming, although the clues were all over the place. I saw The Village coming, but I still liked the film (many did not and that's fine).

Overall, though, I think most twist endings are cheesy. It's very hard to pull such things off well.

[Leah]

Persopolis, made me angry.

[Kaped-Kaper]

I was shocked by Sleepaway Camp
Didn't see that coming.

Oldboy was also a real shocker.

And Unbreakable is one of Shamalan's best imo.

One that made my stomach drop was the one in, The Ring.

And one that made me cry *in a macho way* ... Memento!! *sobs*

[fancy]

How about these ones: 
Passengers,  Mindhunters, The Illusionist, Dead End (not a good movie but definitely annoying end), Revolver (ending just doesnt make sense),

[Chainsawmidget]

April Fool's Day (the original) had a nice and clever twist at the end. 

[Jim H]

The Original SAW definitely had one of the better twist endings that I've seen.  

Bah, humbug! I was angry about that. Do they expect me to leave my brains at the entrance? A man deadly ill lying on the floor, playing dead for hours a few steps away from a doctor? Did You ever try to pretend You're dead? If You manage 10minutes You're good.

It's revealed in one of the later movies that he was able to do it because he was drugged.

The Sixth Sense I didn't guess.  I remember thinking something was off, but I didn't catch on in time.  This is opposed by The Village, where I guessed the twist FROM THE TRAILER.

[Vik]

Fight Club, that was definately a great twist. Fantastic movie, didn't see it coming. Although I did suspect A twist because there were these flashes of Tyler Durden during the movie

[Killer Bees]

The Mist blew me away.  I was shocked and saddened at the ending.

Rogue Assassins with Jet Li and Jason Statham.  Didn't see it coming.  Maybe I'm a little too innocent for my own good?

The Sixth Sense.  But I sussed out The Village pretty quickly before I even saw it.

I'll post more as I think of them.