Rocksa said:
In the movie Timeline, student Andre Marek gets his ear cut off in the final battle which unlocks his inner badass, since it reveals that he is, in fact, the knight that they find in a sarcophogas at the beggining of the movie. The problem there is that it means that everything was already set, which means not a damn bit of their actions mattered since none of the characters actually had free will. What had happened, would happen, and would always happen in a loop, now and forever. Not a bad plot twist per se, but really crappy and kinda makes the entire plot of the film feel pointless when you think about it.
I would suggest reading the book instead. That... er... never happens in the book. I really liked the book, but I didn't even
know they made a movie out of it.
But whenever I see "bad plot twists," I automatically jump to the king of all horrible plot twists:
Tsubasa Reservoir Chronicles.
SPOILERS
The ending was just one giant WTF. "The male main character is the son of his own clone, who married the female main character's clone and gave birth to him, and..." et cetera, et cetera.