The Sixth Sense (allthough it had crossed my mind, as you never see Bruce Willis talking to anyone else but the boy)
Fight Club
The Matrix

That Obscure Object of Desire -
The leading man finally wins/steals his woman. She's with him in the street looking at a window of a shop.
BOOM!
Seperatists blow them up in a random act of terrorism.

I was really shocked at the end of Pay it Forward. The ending kind of pissed me off.

When Travolta turned around and had his gun there I was thinking to myself "Now what moron would have his gun out with his finger on the trigger and pointed at the guy in the back? That guy's going to get shot" Next thing I know, there's a big splotch of red. Was laughing for a good five minutes after that.

ok- in the vein of spoilers- and since I wont see it- someone explain the end to the life of david Gale. please...

Has Jacob's Ladder been mentioned yet? A fucked up little movie but the ending was kind of disappointing even though it was a twist.

Dark City
Memento
Identity
The Matrix
The Life of David Gale.. not a super shocker... but more of a slow surprise
Wild Things... a hot, frumpy Neve Campbell screwed everyone!

The ending to Sleepaway Camp is still embedded in my mind. I am not a spoiler so if you want o know bad enough, hunt down a copy and watch it.

You guys have posted so many but I wont repost. To avoid being redundant I'll name some of my favorites that you guys left out, and shouldn't have forgot!

1. Se7en
2. The Shawshank Redemption(we knew it was going to happen, but I loved the way it happened).
3. American Beauty
4. Resevoir Dogs

and I second the vote for Jacob's Ladder.

Guy Ritchies films

Lock Stock and Two smoking barrels

and

Snatch

Both endings wrapped up so neatly that by the end my reaction was "That was a fucking great ending"

Identity, I wasn't paying close attention, so the killer being the kid totally thre me off,
The Usual Suspects, although you tend to expect twists like that in a Kevin Spacey movie.
The Others, self explanatory.
The sad thing is, most of these movies are only good the first time, because of the twist ending there's no need to keep seeing the movie over and over...

mullholland drive

My faves were:

The Usual Suspects
Fallen ("Oh you forgot, this story is about the time I ALMOST died")
Memento
The Others
Seven

I can usually pick the supposed suprised endings a mile off but there are a couple that I had no idea about. Fallen blew me away. And that planet of the apes one where the earth blows up in the end suprised me heaps. I think it was the second one. Anyone else know?

Had I not read an offhand reference to it while reading a newspaper editorial, (dammit!) it would have been The Sixth Sense. Beyond that I would vote for Memento and one final twist.

That was awesome. I did not see that coming either. That big ole shark just jumps up and snatches the entire body of Samuel. Classic. I just kept looking around and thinking, wtf...he is the marquee name, star of this feature, who's gonna carry it now.

LL Cool J that's who.

-bear

I just remembered the ending to Snatch caught me off guard too.

The Spanish Prisionar
Fight Club
Usual Suspects
The Enigma Code

how about primal fear, when it turns out ed norton is faking it all!

I'll dig up an old one but a good one: The Manchurian Canidate.

Not really a "holy shit" ending but a great twist to it all. A more recent one is "The Shape of Things."

I completely forgot about that. That was a great fucking ending.

And The Usual Suspects is a movie I can watch again but usually I watch it with someone who never saw it before so I can see their reaction.

Besides the above mentioned movies, I thought "Wild Things" had a great twist ending, making Neve Campbell's character into a total bad ass. Of course the scene with her and Denise Richardson getting it on, only made the movie sweeter :)