Memento

I think this is the best film ever created. Let me explain this further. This film was made with basically zero budget, and even that went to the actors/actresses only, essentially. Now, usually, that wouldn't matter, and it actually doesn't really matter here either. I brought it up for one particular reason: it shows that the masterpiece this film was, was purely the genius of Nolan's writing and amazing cinematography. Insane plot, and very engaging; I love these types of challenging films.