Messiah of Evil (1974) -
I decided to check this one out due to a few glowing recommendations over the past couple days. I was quite impressed, but I prefer the first half by a hair. Blurring the lines between which off-kilter behavior was simply the result of people being creepy and which was actually life-threatening got under my skin since there was a clear escalation to it. For instance, a gas station attendant randomly fires a gun into the distance, a creepy old man tells a disturbing story about his birth, and then a driver randomly bites the head off a rat. The characters we're introduced to should raise red flags, yet the ambiguity to their motivations and how they seem harmless makes it hard to figure out who to trust and who to fear. This caused the first notable character death to come as a surprise since, given the scene prior, I was ready to trust everyone at that point. That sequence is the climax to the film though. The mechanics of the Messiah become pretty clear after that, so I don't think the film was able to maintain this tension going forward. Fortunately, the second half still packs a strong punch by calling attention to the unpredictable nature of how the townsfolk operate and adding enough variation to their scenes to keep itself unique, with the obvious standout being the theater scene. Just thinking about all the monster/zombie/cannibal films I've seen over the years, I was impressed with how the film took elements from all three, yet something wholly original emerged out the other end. Again, I still prefer the first half since the strangeness of its tension-building is truly unparalleled, but the second half has somewhat improved for me upon reflection. Overall, I'd definitely describe this as a forgotten classic and would recommend it to all horror fans.
Mouse, not rat. Review invalidated.
I'm, I will say my own experience with this movie was that my opinion of it started strong and it's just grown over the years as I realize whenever I go, "yeah, I'd like to get a suspenseful mystery full of uncanny horror like Messiah of Evil," it's hard to come up with other movies exactly in its quadrant in space.
I never mentally partitioned it into halves though. Mostly the escalating movie and the abrupt ending... which even that ending doesn't feel completely out of place given the precedent of such things from my recollection of various Lovecraft short stories and even Poe's The Fall of the House of Usher ends quickly and from a narrator's experience.
Tonally the movie seems to exist as some weird mixture (or maybe perfect mixture) of Carnival of Souls, Gates of Hell, and some type of folk horror mystery, like The Wicker Man (but without the music, obviously). Tudyk and Katz* have spoken about how the European art house films of the time influenced them, such as Antonioni, which probably helps explain some of it.
*: of American Graffiti scriptwriting fame and Howard the Duck directing infamy.