15. The Movie Is Actually A Prequel - Final Destination 5
The Twist: The entire movie is a prequel to the original Final Destination, concluding with surviving protagonists Sam (Nicholas D'Agosto) and Molly (Emma Bell) boarding the very same flight that to Paris that Alex Browning (Devon Sawa) predicted would explode just minutes before it did in the first movie, thus bringing the series full circle.
Why It Saves The Movie: For most of its run-time, the fifth Final Destination is a garden variety horror sequel that doesn't colour outside the lines. The "kill or be killed" gimmick introduced half-way through the movie isn't employed skilfully enough, though the final reveal, in a welcome callback to the original, certainly made fans perk up and pay attention to what is hopefully the final film in the series. To continue after this would seem like a betrayal of an amusingly neat finale.