In the world of cinema, a well-crafted ending can elevate a movie from good to unforgettable. Some films have mastered this art, delivering shocking finales that leave audiences stunned, pondering the meaning, and, in some cases, reshaping the entire narrative that preceded them. Here are ten movies known for their jaw-dropping endings that caught viewers completely off guard: "Oldboy" (2003) - This South Korean neo-noir action thriller directed by Park Chan-wook offers one of the most disturbing twists in cinema. The protagonist's realization that he has been manipulated into an incestuous relationship with his daughter is a harrowing and unexpected conclusion that left viewers stunned.