The Final Shock: 10 Unforgettable Movie Endings That Left Audiences Stunned

"Shutter Island" (2010) - Directed by Martin Scorsese, this psychological thriller's climax reveals that U.S. Marshal Teddy Daniels (Leonardo DiCaprio) is actually a patient on Shutter Island, deluded into thinking he's investigating the facility. This twist recontextualizes the entire film, showcasing Scorsese's mastery of narrative and suspense.