10 More Horror Movie Twists That Pissed Everyone Off

Coming hot on the heels of The Sixth Sense and Unbreakable, hope was extremely high for M. Night Shyamalan's Signs. And to be fair, this 2002 release is actually pretty darn good. Well, until its largely-panned final act.

Of course, Signs focuses on the Hess family as an alien invasion swarms the planet. What do these creatures want? How can they be stopped? Surely mankind won't be any sort of match for these otherworldly beings and their supersmarts?

Nope, water. All it took was a bit of water.

After doing such a great job of exploring the Hess clan - grieving widow Graham, his younger brother Merrill, and Graham's two young children - and in building up palpable dread at the prospect of the world going to the dogs, these aliens just up and leave Earth. It then becomes apparent in the final act - as Merrill battles one of the creatures left behind - that coming into contact with water proves fatal for these travellers from the stars.

That twist is totally dumb in real-time, but gets even dumber when you step back and think about how 70% of the planet is made up of water.