Memento
Memento had me going “okay I get it” for like an hour straight just to realize I had absolutely no idea what was going on. Then when the ending happened I finally understood.
I really wish I watched it in one sitting because this movie demands your attention. The way the black and white scenes finally connect with the color timeline is so satisfying.
What a way to make a psychological film, Nolan. One of those movies where reading about it afterward is half the fun.