* ActorAllusion:
** The character played by Creator/JanetLeigh gets in a car that is similar to one she drove in ''Film/{{Psycho}}'', with a piece of film's score playing in the background. She also tells Laurie that the shower is clogged - a reference to her character's famous death in the film. The character was intended as an ActorAllusion to PJ Soles - as it was named after her character from ''Film/{{Carrie 1976}}''.
** Likewise Norma's motherly attitude towards Laurie was intended as this, to serve as a nod to the fact that mother and daughter were starring alongside each other.
* FollowTheLeader: Much of the film is heavily influenced by ''Film/{{Scream 1996}}'', which had revived the slasher genre just over a year before this film came out. Dimension Films (who produced both movies), got Kevin Williamson (writer of ''Scream'') on board to produce and write this film. Even it's original musical score from John Ottman was largely scrapped in favor of recycled music cues from Marco Beltrami's score for ''Scream''. Both films largely follow the same formula with an "opening victim," snarky references to other slasher films, cameos, and Michael Myers was even supposed to be a killer-in-disguise in the original script (see below).
* TheOtherDarrin: Due to Creator/DonaldPleasence dying shortly after the sixth film, Dr Loomis's vocals are done by a sound-alike actor Tom Kane.
* ThrowItIn: Music/LLCoolJ ad-libbed the line "and comb your hair", inspired by Creator/JoshHartnett's messy hair.
* WhatCouldHaveBeen:
** An earlier version of the script didn't ignore the previous three films. A scene was planned where a student in Laurie's class would give a report titled 'The Haddonfield Murders' about Michael Myers's pursuit of Jamie Lloyd. Afterwards, a heartbroken Laurie would go to the bathroom to vomit. This was later abandoned so the film could exclusively focus on the Laurie Strode part of the franchise.
*** Interestingly, some aspects of this version do remain in the final script. For instance, in ''Film/Halloween4TheReturnOfMichaelMyers'', it's explained that Laurie had died in a car accident. H20 retconned this by explaining that she faked her death. All of this is kept in the final version of the movie, as it was too ingrained in the film's plot and message to do away with.
** PJ Soles, who played Lynda in the [[Film/{{Halloween 1978}} first film]], was the original choice to play Laurie's secretary. The character's name Norma Watson was intended as a ShoutOut to Soles's StarMakingRole in ''Film/{{Carrie 1976}}''. She dithered for a while about whether to take the role and they eventually asked Janet Leigh after Soles failed to give them an answer.
** Creator/JohnCarpenter was originally considered as a director. But after disagreements about money, he walked off the project.
** The killer's death had multiple original possibilities - including Laurie trapping him in between a retractable gym floor and then stabbing him with a javelin - or being eventually cut in half by a helicopter's rotor blades.
** The killer in this was intended to not be Michael Myers at all, but [[JackTheRipoff a copycat killer]] (and this would be explained in the next film). Ultimately ''Film/HalloweenResurrection'' explained that Myers had switched places with a paramedic last-minute instead.
** The movie Sarah and Molly have in their dorm room would originally have been ''Film/SoIMarriedAnAxeMurderer''. The joke would have been that they were watching a movie starring Mike Myers.
** The role filled by Nancy Stephens - reprising her part as Marion Whittington (nee Chambers) from the first two films - was originally for a new character. It would have been the daughter of Dr Loomis, Rachel, whose house is broken into.
** Likewise a subplot featuring two detectives tracking Michael for Marion's murder was cut from the film. As such they only appear in one scene and are promptly forgotten.
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