It turns out Brad Pitt's character is like a psychotic "imaginary" friend of Edward Norton's character. Edward's character ends up shooting himself in a last-ditch attempt to get rid of him.
Planet Of The Apes
The original late-sixties classic had one of the most infamous plot twists in cinematic history. For those few who haven't seen it yet, here's a hint (from Charlton Heston): "They blew it up!"
The Empire Strikes Back
"Luke, I am your father!" Of course, we found out in the second Star Wars film that baddy Darth Vader was actually Luke Skywalker's baby daddy. And he told him AFTER he chopped off Luke's hand!
Return Of The Jedi
And, of coure, we learn in the NEXT Star Wars movie that Luke & Leia were actually bro & sis! And that revelation-of course!-DIDN'T make their passionate kiss in EMSB less creepy at all!
The Crying Game
People are STILL talking about this plot twist to this very day even though this film came out in the nineties. Again, for those few who DON'T know what the "twist" is, GOOGLE IT!!!! OK? OK!
The Sixth Sense
YES, THE CREEPY KID CAN "SEE" DEAD PEOPLE!!!! AND, OH YEAH, BRUCE WILLIS IS DEAD!!!! AS A DOORNAIL!!!! LIKE SIX FEET UNDERGROUND DEAD!!!! LIKE PUSHIN' UP DAISIES DEAD!!!! 'NUFF SAID!!!!
The Force Awakens
And, oh yeah, Han Solo bites the big one in The Force Awakens. Not sure how much of a "plot twists" this actually is but it actually DID "upset" people when it was revealed so there you go!