Donnie Darko
I feel like this Film is really similar to Mullholand Drive in its structure because of the reveal of the reality that is made in the second part and the lucid dream feeling you get from the first,which is kinda funny since they both came out in the same year.
The Cinematography and the music on this one are perfect.
All the shots where Jake Gyllenhal has his back turned to the camera showing his the whole scene surriding him,the shots where he's facing the camera while Frank is talking to him,the whole bile ride/Roberta Sparrow house segment,the piano motive,and the ending are a perfect fit for the Horror/Psychological Thriller genre,or atleast thats exactly how I would intend it.
Oh,and Jake Gyllenhal's performance on this incredible,I liked the whole Doomed thing about his character.