7. Jurassic Park III
Though Jurassic World: Fallen Kingdom delivered a head-smackingly stupid ending involving cloned human children and dinosaurs running amok amid civilisation, Jurassic Park III went one worse by actually teasing an exciting ending only to pull the rug out and just roll the credits instead.
It's not much of a secret that the third entry into the action-adventure franchise was a deeply troubled production, with the script still being written during shooting.
As a result, its actual ending wasn't shot until reshoots four months after principal photography wrapped.
At around the movie's 80-minute mark, Alan Grant (Sam Neill) and the other surviving humans are met at the shore by the Marine Corps and the Navy, as called in by the first film's protagonist Ellie Sattler (Laura Dern, in a literally phoned-in role).
It's a bit of a deus ex machina, but it at least seems to promise that the film will go out on a bang with an epic third act full of Marine vs. dinosaur action, right?
Wrong. Within two minutes of the Military showing up, Grant and co. have been transported away from the island and the end credits have rolled, with one final passing glimpse of the Pteranodons flying away from Isla Sorna.
It honestly might be the most insane anti-climax in the history of tentpole cinema. Given that the two prior Jurassic Park movies clocked in at over two hours each, for the threequel to last just 92 minutes and rush its way to a non-event of a conclusion is just an insult to anyone who ever paid for a ticket to the previous movies.
Say what you want about Fallen Kingdom, but at least it had an ending that didn't feel ass-pulled totally out of nowhere - braindead though it still was.