War
Jet Lee never did explain why his voice changed. And while the twist may still have worked, despite the unlikelihood of any plastic surgeon also battle-damaging his work with so much acne, the ending looked oddly spliced together with whatever was available after Jason Statham left.
While I'm on the subject of movies that don't make me feel I'm missing anything, Untraceable rips off a ten-year-old Millenium episode that was based on Fincher's own Zodiac killer and I'm glad someone noticed.