Movie: Don't Look Now (1973)
Writer: Daphne du Maurier (original short story); Allan Scott and Chris Bryant (screenplay)
The twist in Nicolas Roeg's Don't Look Now isn't so much “shocking” as it is “outright strange,” and, most importantly, weirdly amazing.
On vacation in Venice with his wife, Laura (Julie Christie), John Baxter (Donald Sutherland) repeatedly sees a mysterious figure lurking around back alleys, and, due to the red coat on said figure's back, which matches the one worn by his dead daughter wore when she drown, he believes it's his little girl's ghost.
So, working up the nerve to confront his daughter's spirit, Baxter follows the red figure up a tower's staircase and into a belfry.
Where he discovers that it's actually a old-woman-looking dwarf, the same nut-job who's committed a series of local killings discussed on various news reports throughout Baxter's stay. Before he can even scream, the miniature butcher pulls a large knife from her coat pocket and jams it into Baxter's throat.