It goes without saying that an ending can make or break a movie - get it right and you elevate everything that came before, but screw it up and you can fatally derail a film no matter how well-crafted it might otherwise be.
And there's nothing like a movie that teases one ending only to ultimately go in an entirely different direction.
Sometimes our expectations can be subverted to electrifying effect - Captain America: Civil War teasing a showdown against a supersoldier army only to cancel it last-minute, for instance - but doing this in a way that doesn't disappoint is extremely challenging.
After all, movies are all about wish fulfillment, and if you tease viewers with a tantalising finale only to deliver something else entirely, it needs to be damn good.
And that's where these 10 movies - some of them good, some of them bad - all came unstuck.
Each promised a spectacular and gratifying ending only to serve up a woefully inferior replacement, demonstrating a certain creative cowardice or, in the very least, sheer laziness...
Stay at home dad who spends as much time teaching his kids the merits of Martin Scorsese as possible (against the missus' wishes).
General video game, TV and film nut. Occasional sports fan. Full time loon.