Contractual Purity: As noted below, Betsy Palmer was known as a squeaky clean goodie two shoes before this film. According to her, after it came out there was an outrage. One critic published her address in the paper and encouraged people to send her hate mail.
Cowboy BeBop at His Computer: When the film was aired on AMC's "DVD on TV" note Something they did in the early 2000's where they'd air a movie in letterbox format with trivia bits airing on the bottom of the screen it featured an interview with Robbi Morgan, who played Annie. After talking about her role in the film, she ended by saying she was honored to be Jason's first victim.note Which is wrong on two levels, because she wasn't even Pamela's first victim; that honor goes to the counselor in the opening
Creator Cameo: Tom Savini doubles for Brenda when her body flies in through the window.
Enforced Method Acting: Ari Lehman, who played Jason was originally intended to only appear in a short flashback of him drowning. But the director decided to have him appear in the end as a surprise. He was instructed not to show anyone the mask he wore for the scene. The shock and fear on Alice's face is genuine.
Money, Dear Boy: Betsy Palmer's only reason to appear was to get cash for a new car.
Initially for Betsy Palmer, who was bemused and hesitant from the start and experienced a lot of backlash for the role. As the years have gone on though, she's embraced the movie and the sheer dedicated devotion from fans that has come to define her career.
Subverted for Kevin Bacon, who despite being the most successful of the cast has never been embarrassed to talk about it. This is the guy who spent the longest time unable to even mentionTremors.
Playing Against Type: Betsy Palmer mentioned how at the time she was typecast as a Girl Next Door and stuck doing game shows. So playing a "psycho-biddy" was quite a different role for her.
Reality Subtext: Mark Nelson, Jeannine Taylor and Kevin Bacon all knew each other beforehand, which is reflected in the banter between Ned, Marcie and Jack.
Throw It In: The bit with the snake in the cabin wasn't in the script but Tom Savini suggested it after his own personal experiences.