Simple enough, post the name of a movie that you think everyone should try to see, primarily movies that aren't as popular or maybe older classics that are still really good but not many people these days have seen.
Personally I'd recommend 'Behind the Mask: Rise of Leslie Vernon'
It's a mockumentary horror movie from 2005 where a group of journalists shoot a documentary about a serial killer in a universe where jason, freddie, Michael myers and other famous horror movie villains exist. It forgets the found footage aspect at times but it's an excellent satire of the murderer genre and I enjoyed it more than the likes of say, Cabin in the Woods.
And for any Walking Dead fans the actor of Hershel makes an appearance.
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The Shawshank redemption The good the bad and the ugly A fistful of dollars The Matrix Tron Inception Ferris Bueller's day off Ace Ventura Jurassic park Shaun of the Dead Hot Fuzz Indiana Jones (original trilogy) Star Wars (original trilogy) All 4 Monty Python movies Back to the future trilogy The man with the golden gun Skyfall Gladiator