Plot hole: At the end of the movie, the fire department and paramedics arrive just after the house has been set on fire. Yet, as the focus shifts to the outside view, the house has burned all the way down (which takes a couple of hours) and the paramedics STILL have not gotten around to sending Sara and Freddy away for questioning or hospital or the like.
Continuity mistake: When you see Sara riding her moped up on the road on the way to the meeting with Freddy the sky is blue and dark but when you see her enter the door to the room you can see in the background sunlight coming in from the windows onto the walls. (00:20:50)
Factual error: As we see in some of this series, Michael pins his victims to the wall with butcher knives. A kitchen knife isn't capable of holding a person's body weight pinned to a wall.
Continuity mistake: Sara slips and falls in a puddle of blood. When she gets up, her hands are all bloody. When she goes over and tries to open a door, they are clean. (01:17:05)
Continuity mistake: When the third knife is stabbed through Rudy you see it come out of the other side of the door but you don't see any of the other two knives below it. (01:04:25)
Visible crew/equipment: When Michael Myers enters Harold's room at the institution and hands over the knife Harold says, "Michael Myers". If you look carefully on the wall on his right you can see shadows of camera equipment and wiring and also when he is walking past the window you can see a reflection of a camera. (00:14:45)
Continuity mistake: We see countless times that there is a wooded area behind the Myers home (especially after the house burns down, it is seen more clearly). But in the other films, the Myers home is in the middle of a residential neighborhood. Behind his house would be the back of another house.
Audio problem: When Freddy is watching Fist Of Fury he hears the doorbell and says something as he turns his head, but his mouth doesn't move.
Audio problem: After Michael is hung by the camera cord Sara receives a message from her palm pilot saying, 'HE'S STILL ALIVE'. The palm pilot beeped before she got the message. (01:11:10)
Plot hole: When the guard sees Michael on the security camera, why does he think it's Harold? Did he all of a sudden change into coveralls and gain access to a large knife?
Continuity mistake: When Jen's head is on the floor you see the view from her attached camera is facing Sara, Rudy and Jim but when you see Jen's head on the floor the camera is in a position where it is facing straight at the floor. (01:01:25)
Continuity mistake: When Michael first gets his head cut off by Laurie the eyes of the severed head are clearly wide open. (in H20 and in flashback scene) Then when they remove the mask from the head, not only is the mask suddenly and noticeably different, but the eyes are now closed.
Continuity mistake: When Rudy is in the kitchen, he tries to open a door but it's locked. After Michael pins him to that same door, he opens it right up and walks through.
Continuity mistake: In the garage, Sara falls into a cart with equipment on it. It tips over easily yet the equipment lands on Sara's leg and she's unable to move.
Factual error: School emails are .edu, not .org.