Hundreds of children were left terrified and traumatised after a movie theatre played horror film The Curse of The Weeping Woman instead of Detective Pikachu.
The massive mixup occurred during a screening in Canada - and was tweeted in real-time by Screen Rant journalist Ryan George.
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The trouble began early when the trailers started. Instead of a kid-friendly teaser for a film about cute stuffed toys, children were subjected to snippets from Annabelle Comes Home - a supernatural horror film starring an evil doll.
"The theatre I'm in is playing a trailer for Annabelle Comes Home before Detective Pikachu LOOK AWAY CHILDREN OH NO," George tweeted.
It was at this point that George reported children started crying. But this was only the beginning of their terror. The kids were forced to endure trailers for the Joker and the Child’s Play remake.
After sitting through this psychologically damaging experience, the children might have expected the horror to be over. They were wrong.
"OH MY GOD THEY'RE PLAYING LA LLORANA INSTEAD OF DETECTIVE PIKACHU," George wrote.
The Curse of La Llorona - also known as The Curse of The Weeping Woman - is a film based on Mexican folklore about the ghost of a grieving mother who attacks young children.
Notoriously, it opens with a scene of a mother drowning her child.
It was only at this point that the theatre realised the monumental mistake and turned the film off.
The group was then moved into another room where Detective Pikachu was paused on the screen. It is believed two audiences might have accidentally mis-seated - and a group of horror fans were forced to sit through trailers for kid's movies.
It's unclear who suffered the most.