* SugarWiki/AwesomeMusic: Harry Manfredini's score for the film seems like "generic" slasher film music today thanks to SeinfeldIsUnfunny, but that's because it was arguably as memorable and inspirational as Creator/JohnCarpenter's ''Franchise/{{Halloween}}'' theme.
* BigLippedAlligatorMoment: When a policeman shows up at the camp looking for Crazy Ralph, it is badly timed to Ned running out of the cabin dressed as an Indian, screaming and dancing around. He says "oh shit" when he spots the cop but the characters don't bat an eyelid. It adds nothing to the plot and is just so random.
* CriticalDissonance: Critics more or less hated it, but it went on to be one of the biggest slasher films ever made.
* ItWasHisSled: The killer is probably known to most people who are familiar with the series. Though to those unfamiliar with the series, they still might be surprised to see [[spoiler:Jason's lack of appearance]].
* NarmCharm: [[spoiler:Mrs. Voorhees alternating her voice between her own and "Jason's"]].
* JerkassWoobie: [[spoiler: Pamela Voorhees. The novelization implies she only went on a killing spree to save further campers from Jason's fate.]]
* OneSceneWonder: Crazy Ralph appears twice in the film, and steals the show both times.
* SeinfeldIsUnfunny: Averted. Although the end of the film ripped off ''Film/{{Carrie|1976}}'' which has become an example of the trope, fans do find the ending to the film scary.
* SpecialEffectsFailure: Offscreen lightning strikes are simulated by flashing lightbulbs at actors.