10 Movies Utterly Ruined By Their Final Revelations

9. High Tension

When novelist Dean Koontz found himself being drawn into a potential plagiarism lawsuit with the creator of French extreme horror movie High Tension he described the film as "so puerile, so disgusting, and so intellectually bankrupt," refusing to get drawn into legal action to avoid having his own material in any way associated with it. It's certainly not the most sophisticated horror film ever made, providing a string of gory and violent sequences and precious else. The threadbare plot and distinct lack of tension (especially given its title) could be forgiven, particularly if you're a fan of brainless B-movie horror, but the same can't be said for the completely nonsensical and illogical twist the movie finishes up on. High Tension's contribution to the history of terrible endings comes in the revelation that the serial killer is actually an alternate personality of the protagonist. Like an axe chopping off a head, in one fell swoop the filmmakers managed to completely undermine everything which came before, leaving the audience scratching their heads as it dawns on them that none of it makes any sense any more.