Being a genre brimming with the potential to introduce barmy pieces of new technology and mind-boggling concepts into a big-screen tale, the sci-fi universe is one known for throwing out more than a few unexpected occurrences along the way.
Admittedly, not all shocking science fiction swerves are equal, with some coming out of the blue for all the wrong reasons.
But for every hilariously absurd development thrown into a narrative as a clear attempt to cheaply stun the paying public, there has thankfully been more than a few other astounding revelations and twists that resulted in the sort of audible gasp all sci-fi creators long to be the cause of.
Whether they were laughably dumb or exceptionally executed, though, the following events all had one thing in common: Even the most dedicated sci-fi fanatic likely didn't have the slightest clue what was heading their way.
So, from one jaw-dropping monologue changing the way you view one of the galaxy's biggest plot holes forever, to a big bad reveal catching just about everybody off-guard, these are those science fiction happenings that next to nobody saw coming.
10. Maisie Is A Clone (Jurassic World: Fallen Kingdom)
After being introduced early in Jurassic World: Fallen Kingdom as the apparent granddaughter of Sir Benjamin Lockwood, John Hammond's former dino cloning partner, things quickly started to feel a little off when it pertained to the dino-loving Maisie.
And on the back of a number of conversations consisting of Lockwood claiming she looks just like her apparent mother and Maisie finding a photo with her old nanny Iris looking far younger beside a figure who could be the youngster's twin, one of the most unexpected twists in the franchise's history soon made itself known.
Maisie was actually a genetically engineered clone, created in a similar way to the dinos occupying Lockwood Manor. But instead of being the sort of awesome game-changer Colin Trevorrow and Derek Connolly were clearly hoping it'd be, the sight of the cloned daughter of Lockwood bizarrely bonding with the dinos she explained were "alive... like me" had the wrong sort of unanticipated impact.
The fact this odd reveal was then somewhat retconned in Dominion, with Maisie actually being revealed to have been carried by her mother/genetic template Charlotte in the womb, also tells you all you need to know about how poorly received this particular shock revelation ultimately was.