I Am Your Father! The Spoiler Spoiler Thread -- What are the biggest ever spoilers? [spoilers]

[Dioltach]

Andy was planning his escape all along.

 

[Arilyn]

In the spirit (see what I did there?), of Bruce Willis, "The Others, " Grace (Nicole Kidman) and her two children are the ghosts all along in a haunted house tale.

 

[Snarf Zagyg]

That was also my go-to. Second place would be another M. Knight Shamalamadingdong movie, "Unbreakable." The mentor did it.

Spoiler- M. Night Shyamalan always tries, but never succeeds, in recapturing the twist "magic" of Sixth Sense.

 

[Snarf Zagyg]

Anthony Perkins' mom was dead the whole time.

 

[Snarf Zagyg]

There's a reason that you don't hear Edward Norton's name.

 

[Willie the Duck]

Not exactly sure if this counts, but I'm guessing no one went into The Last Temptation of Christ (or The Passion of Christ) not knowing what was going to happen to the titular character. Same for The Assassination of Jesse James by the Coward Robert Ford or any movie involving Gandhi, Abe Lincoln, etc.

Andy was planning his escape all along.

As was Captain Orr.

For consideration of the world's smallest movie spoiler/movie twist that changes things the least, I nominate, 'it was Sweet Pea's story all along.'

 

[Ryujin]

Spoiler- M. Night Shyamalan always tries, but never succeeds, in recapturing the twist "magic" of Sixth Sense.

Somthing, something, one trick pony.

 

[trappedslider]

Walter Neff is mortally wounded (Double Indemnity, 1944)

 

[Dioltach]

Carlito gets shot at the end. (OK, not really a spoiler, because the movie's opening scene is where he's shot, but the first time I watched I'd completely forgotten.)

 

[billd91]

The fuel truck was a decoy to draw off the Humungus's gang.