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Halloween 4: The Return of Michael Myers (1988) Poster

Goofs

Audio/visual unsynchronised 

When Dr. Loomis & Dr. Hoffman are in the mental hospital, Dr. Hoffman answers the phone. He says, "I see. I see, thank you," but his mouth movements don't match the words. We then hear him yell, "Loomis! Loomis!" but he is clearly not actually yelling.
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Continuity 

Michael reaches into the truck and rips Rachel's sweater, but in the following scene, Rachel's sweater miraculously returned to normal, buttoned and all.
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Michael's full name is Michael Audrey Myers yet in the mental hospital when someone is typing his name on a form they write Myers, Michael M (possibly character error).
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The wall behind Michael changes as he takes the gun away from Brady. First, there is a solid wall with decorative hangings, then there is a shot of the front door, then the solid wall again.
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Michael's hair from the mask changes from straight messy brown, to full curly blond when Loomis is thrown into the glass doors.
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When Dr. Loomis parks his car outside of the filling station, he stops past the last gas pump. The next shot shows his car much closer and he tries to fill it up.
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As Rachel and Jamie slide down the roof, they look down and a bike can be seen on the ground. When Jamie ends up running to Rachel later on, the bike is no longer there.
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Rachel's purse disappears and reappears when she sees Michael and runs from him, while she is looking for Jamie.
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The blue sedan Dr. Loomis parks at the pumps outside the gas station is different than the one that blows up minutes later in the same location during a fire. The vehicle he parks is a 1982-1983 Chevy Malibu with four headlamps and one kind of grille. The vehicle that explodes in the fire is a 1980-1981 Malibu with two headlamps and a different grille.
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The burn scars on Dr. Loomis' face change periodically throughout the movie. There is a dramatic change from when he is riding in the truck with the preacher on his way to Haddonfield compared to when he arrives and comes into the police station.
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Crew or equipment visible 

When Jamie and Rachel get into the cop car and Sheriff Meeker drives off, you see Michael Myers standing in the road. Right before the scene ends, crew making the smoke blow are visible on the far left of the screen.
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The cameraman is reflected in the window when Dr. Loomis runs to the window to look for Michael.
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When Rachel is waiting for Jamie to go trick or treating, right as she gets up from the couch, the camera is reflected in the window.
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Reflected on the side of Lindsay's car as Jamie is getting into it.
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Errors in geography 

When Dr. Loomis is hitchhiking down the road and the preacher picks him up, mountains can be seen in the far distance of the direction that they're traveling. There are no mountains anywhere in the state of Illinois.
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Miscellaneous 

Leslie L. Rohland's character of "Lindsey" is listed as "Leslie" in the end credits.
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Michael Myers had been at Smith's Grove - Warren County Sanitarium prior to his escape in Halloween and was being transferred to that location at the beginning of this movie. The patches on the medical personnel say Smith's Grove, but the ambulance is labeled as Smith Grove.
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Plot holes 

Michael got his overalls from a mechanic he killed by impaling the guy with a metal rod in the chest area. Yet there is no blood or holes on the coveralls.
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Revealing mistakes 

In every scene before he is shot at or struck, it is obvious that there is protective padding under his coveralls.
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When Michael is in the ambulance car after he grabs the guy on the head he sticks his thumb in his forehead, and on the left you can see the end of the fake arm.
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When Rachael is on the roof of the house and fighting Michael, she slides down the roof and slams into the chimney. When she does, the "brick" chimney flexes as though it's made out of thin wood.
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Michael throws a man into the power grid, effectively killing all of the power in Haddonfield. Even though all of the houses are completely dark, there are inexplicable sources of light that are too bright to be the moon coming from behind trees and buildings, as well as shining in through windows from angles that would be impossible.
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See also

Trivia | Crazy Credits | Quotes | Alternate Versions | Connections | Soundtracks

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