When some movies go to such great lengths to keep the details of their plots under wraps, it can feel quite tragic when spoilers sneak out regardless. But then again, the ways in which this lot were spoiled are just so unspeakably dumb...
1| Thor: Ragnarok
Self-identified "grandpa" Mark Ruffalo got a bit carried away using Instagram at the premiere of Thor: Ragnarok and ended up live streaming the first 10 minutes of the film to the entire world.
"My phone was blowing up, people were texting me, I must have got 50 texts in 10 minutes," he told Stephen Colbert. "I didn't want to be rude and take out my phone and look at the texts. You can't do that in a movie, you're an a-hole if you do that."
Eventually an unidentified person came over to tell him to turn it off.
2| Star Wars: The Empire Strikes Back
It's hard to imagine a time when everyone didn't know that Darth Vader is Luke Skywalker's father, but fans were shocked at the revelation when the sequel was released in 1980.
Well, everyone who hadn't read this article from 1978, reporting from an event in which Vader actor David Prowse explained that Luke would learn that the big, bad guy is his dad in The Empire Strikes Back.
(This is actually a bit puzzling, as the line in the Empire script is said to have been, "Obi-Wan killed your father," with Vader's voice actor James Earl Jones dubbing the real line in later. But there the spoiler is, in black and white.)
3| Toy Story 3
The emotional climax of Pixar's Toy Story 3 sees our heroes stuck on a conveyer belt rolling slowly but inexorably towards an incinerator. It's a real heart-in-your-mouth moment...
...unless you saw the 'Trash Compactor Escape' Lego set, which was released in the month before the movie. It gives a blow-by-blow breakdown of the scene, from Lotso's betrayal to the aliens' 11th hour rescue.
4| Star Wars: The Phantom Menace
You can't imagine the super secretive Lucasfilm being this lax nowadays, but loose-lipped Dave Prowse wasn't the only source of leaks for Star Wars.
Any fans of Liam Neeson might have been excited to see how his new character Qui-Gon Jinn's story would play out over the coming trilogy hopefully didn't check out the soundtrack listing before the movie was released.
'The High Council Meeting and Qui-Gon's Funeral' doesn't leave much to the imagination.
Chalk this one up to a mix of enthusiasm from Sylvester Stallone and obsessive analysis from the fans.
Sly gave us a sneak peak at his desk while he was working on the Michael B. Jordan-starring spin-off/sequel on Twitter. Unfortunately, the final page of the script was in shot. Cue some movie buffs screaming 'enhance' at their computers until the closing scene had been divulged.
6| Oz the Great and Powerful
The Wizard of Oz prequel did its best to avoid revealing which of the film's three enchantresses would end up as the Wicked Witch of the West.
But it didn't account for this mug, that makes it very clear that Mila Kunis's Theodora would end her life melting in a puddle of soapy water. Nice work, Disney merchandise team.
7| Ender's Game
Those unfamiliar with the repugnant Orson Scott Card's science fiction classic probably didn't know the film's twist—the titular hero realizes that war games he has been training on aren't really games at all, but a real drone war against an alien race.
Well, not unless they read the movie's tagline that is. "This is not a game." Oops.
This story originally appeared on Esquire.co.uk.
* Minor edits have been made by the Esquiremag.ph editors.