I always like 'Narrator Movies' because it tell the running story in another style and many time narrator is one of story cyharacter.
Sometimes, Narrator is key of twist and may be shocking and entertain us much more.
Story told from perspective of an 'Unreliable Narrator' who basically fabricated much or all of the entire preceding story.
Some of best shocking narrator movies are:-
1. Brazil (1985),
2. The Usual Suspects (1995),
3. Fallen (1998),
4. Fight Club (1999),
5. American Psycho (2000),
6. Haute Tension (2003),
7. Premonition (2007),
8. Shutter Island (2010),
9. Life of Pi (2012),
10. Goodnight Mommy (2014)
Availability:
The Usual Suspects (1995), Fight Club (1999), Shutter Island (2010), Life of Pi (2012) is available in Hindi