Worst Film Ending?

The Mist. Not because it was a terrible ending, it was in fact a fantastic ending... But how the film concludes is just so gut wrenchingly devastating. I felt sick to the stomach I was that upset by it. The entire film in my opinion was just "meh", but that ending just broke me.

Rat Race is one of my favorite movies on the planet, but the ending was so horribly riddled with one giant pop culture reference. It makes it nearly impossible for that movie to be timeless.

Remembered some more ones. If it has an asterisk by it, that means the movie in general was just awful.

The Happening*
The Dark Knight Rises*
Signs*
A.I.*
Grease
War of the Worlds*
The Number 23
The Forgotten
X-Men: The Last Stand*
Titanic
Paranormal Activity 3

The Purge

The Mist always pops into my head when I think of movies with horrible endings. I wish they would have just went with the book ending. I really like the movie, but the ending was just

Also, pretty much all the Paranormal Activity movies. I thoroughly enjoy them- they always give me a good scare- but I hate watching and rooting for these characters, when I know they're all going to die. LIKE REALLY KATIE JUST STOP IT.

I thought the ending to The Lovely Bones was kinda bad. It felt pretty rushed and half-assed.

A lot of movies I've seen that end without any explaining to what happens next. Those 'leave it to the imagination' endings are the worst. Especially when they don't have sequels.

Also The Mist. That was pretty bad. The Descendents (I believe that's what it was called and how it was spelled.). The whole movie was bad though.

The Purge and The Devil Inside were terrible endings. Also a Cronenberg movie called Eastern Promises had a bad ending. I really liked the movie otherwise, but the ending was just kind of...THE END, you know? Like it came out of nowhere with no resolution and you're just sitting there like, "wait, what? It's over?"

Also The Last Exorcism was just terrible.

I think the theatrical cut of Blade Runner ended badly.

However, that being said, the other cuts of the movie usually fix this, plus a lot of other issues with the movie.

Mama, The Signal and The Devil Inside

Yeah, y'know Beauty and The Beast? In the end when the Beast turns into some chizzled jaw, romance novel duche? THAT. I hated that.

@ ewok
Remember Me's ending actually ties in perfect. I'll explain to you in white because spoilers and such.
His father worked in the twin towers, and the date which is displayed the morning of him going to the towers is 9/11 -- when the terrorist attack on the twin towers occurred. He went there because he was trying to get his father to be a good father to him and his little sister (who, if I remember correctly, had a special day at school or something and she wanted her dad to attend? I'm not 100% sure. Either way, he needed to be a better parent). He dies in the terrorist attack -- while his father lives because he doesn't go into the office early.
His father became a horrible parent when his older brother committed suicide -- working long hours, providing his children only with monetary support, something neither of them was interested in because they wanted a loving father figure in their life and he didn't quite hold up, yadda yadda. The father feels he is at fault for his second eldest child's death, since he wasn't at the school for his daughter's special day (maybe it was graduation?) and the only way his children knew how to contact him was via the office. It took his second son to die in order for him to get his head screwed on straight and pay loving attention to his daughter. It works with the plot line really well, and makes a lot of sense in the context of the day and such.
Honestly, I don't really like the ending because well, it's super sad (I cried) but I can accept it.

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I really don't like open-ended movies.
The worst for it is probably Inception. Great movie, bloody annoying ending.

They comes pretty close too (but I think that movie was awful anyway -- it tried keeping it suspenseful the whole way through, and so it just lost it for me. I can't be kept in suspense, there needs to be relief somewhere.)

I also don't really like the open-endings of Before Sunrise, Before Sunset and Before Midnight, although the first two are okay because, hello, sequels. Even though they were made ten and nine years afterwards.

47 Ronin.

The ending killed it for me (though I know it's how the legend goes).

ADDED--

Also, I absolutely love Beauty and the Beast, but I watched it as an adult after a long time of not seeing it and I just hate the ending! I mean it's still lovely, and wonderful, and amazing, but I hate how he transforms right in front of her face and she still looks all confused. I mean, he has to say, "Belle, it's me!" Then she has to touch his face and hair, look at his eyes and go, "It is you!".....HELLO! Of course it's him! He just transformed right in front of you while you stared on in awe! Wake up lady!