Fallen
The Mist
And lest we forget: Twister and probably the upcoming Twisters

I think Psycho. I follow it with The Sixth Sense.

I like the one in
DH2
!
“Call a SPADE, a SPADE; and a TRANNY, a TRANNY, or an IT!!!”.
"THAT'S SOME BAD
SHIT
,
HARRY
!".

I know it's a cheesy film, but
Wild Things
is a guilty pleasure of mine because there's a twist every 10 minutes or so.
Body Heat
will always be a personal fave; I'll never forget that scene at the end when William Hurt finds his evidence in the high school yearbook.
And the ending of
The Conversation
blew me away; all Gene Hackman needed to do was place the emphasis on a different word in the line "He'd kill us if he had the chance."

What about
Spoorloos
(
The Vanishing
/
Disappeared
) from 1988?
Still
a shocker twist ending! (and
Dellamorte Dellamore
also ranks as a good twist ending, too!)

Citizen Kane.

not yet mentioned:
Sisters (1973) (an early Brian de Palma film, and very creepy)
already mentioned:
Witness For The Prosecution
Body Heat
and of course:
The Usual Suspects

I would add Mystic River as well

Just about anything by Agatha Christie ranks high in the twist ending department. But my favorite is probably '5 Fingers', the WW2 spy film with James Mason.

I have to agree with "No Way Out." Completely caught me off guard. In some circles, The Sixth Sense is also high on the list.

Best twist ever is No Way Out with Costner and Hackman.
The Usual Suspects is close second.
If you better think,Usual Suspects is little bit rip off from No Way Out.
One scary mystery evil man(Soze/Yuri), main character is not who we think he is, main character lying whole time, main character inprisonment(police station/pentagon), reckless powerful men(detective/minister of defence), extremely intelligent and manipularive main character, main character recognized(computer photo/dying hungarian), and main charactet now.villain escapes justice.

I saw 'The Usual Suspects' on the same weekend as seeing Hitchcock's Frenzy, which made for an interesting comparison. Frenzy does not have a twist in the ending, but does take the viewer through a series of micro-twists in the last two minutes, as you think that this has happened, and then you think that that has happened, and then you realise that's not it, but that happened instead, and so therefore the finish will be oh wait, that finish is what's going to happen.
I'd say it's my favorite ending, of a movie. A very interesting two minutes!

Yes you right. Imagine watching this movie in 1995, when this kind of ending was unusual, you would be shocked.

Nobody mentioned Shattered and In The Mouth of Madness.
Cheers!

The Uninvited with Emily browning is a good one. Just saw The Visit and it had a great twist.

Ever? Big word let me get back to ya'

That's the best twist ending on this thread. Thanks for brightening up a dull list of weak twists.
I would say the king of twist endings is a B Western AMBUSH AT TOMAHAWK GAP:
The stolen money they searched for was in the gunpowder sack that blew up
Now go away or I shall taunt you a second time!

This message has been deleted.

unbreakable
se7en
25th hour

I knew what the twist would be in every movie mentioned in this thread. Its to easy cuz im intellogent and your dum.
Furthermore, I knew who the killer was the whole time.

Just to throw in an unorthodox choice: Disturbia.
Not an enormous twist but it was so heavily and intensely executed that it almost make me puke out of fear.
Oh, and
What lies beneath
left my lying sleepless for about two weeks when I was a kid and the twist(s) in that one didn't do my insomnia any good either!

For me, I don't know if I really have a best one, but this film is great, along with The Sixth Sense, The Empire Strikes Back (at release, as the prequels ruined it), Brazil, The Prestige, Atonement and Jacob's Ladder.
I just saw Snowpiercer and that had a pretty good plot twist, as well, though not on the same level as the previously mentioned films.
If we don't succeed, we run the risk of failure. - George W. Bush

Heh I was just about to put Don't Look Now! Also by the same director, Performance. And Dead Man's Shoes has a pretty good twist as well.
"Hot lesbian witches!"

Not all of these involve endings per se, but they do contain great twists and turns regardless. I've separated them according to genre. If I'm repeating any that have already been mentioned, it's because I enjoyed them immensely (and spoiler-free, thank goodness).
Scream
Friday the 13th
The Last Man on Earth
(What
I am Legend
should've been)
Carnival of Souls
Antichrist
The Descent
Night of the Living Dead
Diabolique
The Stepford Wives
Citizen Kane
A Passage to India
A Beautiful Mind
Turkish Delight
Perfume
American Beauty
Abre Los Ojos
Mask of the Phantasm
True Grit
Mysterious Skin
Eastern Promises
Katalin Varga
A Letter to Three Wives
After the Thin Man
Charade
(So, so many twists in this one, it'll make your head spin)
Arabesque
Dog Day Afternoon
(if you didn't know the story ahead of time)
LA Confidential
The Manchurian Candidate
Mildred Pierce
Laura
The Blue Dahlia
No Country For Old Men
Le Samourai
Infernal Affairs
Vertigo
Elevator to the Gallows
Brighton Rock
Safe in Hell
The Letter (1929)
Three on a Match
I am a Fugitive from a Chain Gang
Dead Ringer
The Silence of the Lambs
These were spoiled for me, but they're great twists, regardless.
Jane Eyre
Field of Dreams
Don't Look Now
Rosemary's Baby
Invasion of the Body Snatchers
The Wicker Man