Didn't 'The Machinist' seem like a 'Twilight Zone' episode?
Aside from a touch of Hitchcock in the score during mostly the urgent chase scenes, didn't the overall score, pacing and several story elements remind you of the classic "Twilight Zone" TV series? Consider:
1) hallucinating self-destructive insomniac who "hasn't slept in a year" + scary amusement park ride = Twilight Zone episode about the man afraid to sleep who "hasn't slept in weeks" because in nightmares an amusement park sideshow woman tries to scare him to death on a roller coaster;
2) child/merry-go-round + child getting "hurt" on/by amusement park ride + child by amusement park ride is HIM = Twilight Zone episode of man wishing for simpler time visiting his hometown and after discovering a triple scoop chocolate ice cream is still ten cents sees a younger version of himself carving his initials into merry-go-round/bandshell;
3) brassy blonde hooker with heart of gold = various Twilight Zone episodes, including the "Room for one more, honey!" one where a platinum blonde stripper's bad morgue dreams foretold the crash of the plane she was about to board;
4) jazzy sixties music playing when he enters the bar following Ivan = every third "Zone" episode; and finally (a stretch)
5) paranoia = Twilight Zone "communist subversion" episode where aliens easily turn Everytown USA against itself just by playing with the lights, and the "where is everyone?" pilot "isolation" episode where everyone's vanished (isolation and communism being common Twilight Zone themes).