Revealing mistake: When Hardy goes to check out a victim with Christman, Christman gets in the water to flip the dead woman over and the dead girl blinks her eyes.
Revealing mistake: At the end of the film, when the main female character is done taking a shower, she tries to get out of the glass stall. Suddenly, the ghost turns on the shower to scalding hot temperatures. She is unable to get the door to open, so she punches through the glass and climbs out. As this is happening, if you look behind her, you can see that no water is coming out of the shower head, though you can still here the hissing of the water.
Revealing mistake: The sliding door to the bedroom in Simonson's apartment appears to be covered with a sheet of 'bubble wrap' in early scenes of the room.
Revealing mistake: After Trevor is hit by the VW Bug, the arm he lands on disappears partially into the street, making the CGI obvious.
Revealing mistake: When the guy with the hand missing is playing his guitar, you can see his actual wrist bending underneath the fake arm that covers it.
Revealing mistake: The serial number of the autogyro has been reversed, showing that the stock shot has been reversed for effect.
Revealing mistake: A car is driven off a dock into a body of water. Before the car hits the water, special effects shoot up about 10 different blasts of water.
Revealing mistake: In 1981, when most of the story takes place, the 1981 Dodge Diplomat was the most common police cruiser, but the director of this film chose the 1987 Chevy Caprice Classic.
Revealing mistake: Near the end of the film, when the Cadillac Allante is falling, watch closely and you will see it explode just before it hits the ground.
Revealing mistake: In an early shot shown from the neighbor's house, it is established that the Spencers' house is quite a ways uphill. Some of the later shots where Claire is spying on her neighbors and looking at their home, the angle of view does not appear to be correct. The neighbors' house looks like it's a lot closer and more level with the Spencers' home.
Revealing mistake: When the "dudes" are taking out a load of bin bags, you can see through the lighter coloured ones that they are actually filled with polystyrene chips (the packing kind) rather than any litter.
Revealing mistake: In the scene where Sam Neill has set the bomb to blow up the rescue ship, Laurence Fishburne comes running up to the sealed door of the Event Horizon whereupon it shakes back and forth like a stage door would.
Revealing mistake: Opening scene: in the first shot where the murder victim is fully visible and the camera zooms in a little, the supposedly dead victim is obviously breathing in (his chest is moving a lot). (00:01:05)
Revealing mistake: When the monsters approach The Cyber gang outside the arcade, Cyber Scooby (who wears the red color) is seen in a blue color in one of the shots facing the arcade.
Revealing mistake: When the Enterprise begins to leave the spacedock, the background inside spacedock (behind Enterprise) seems to move in two different directions, the top moves towards the right, the bottom towards the left.
Revealing mistake: When Gerard Butler is driving to the warehouse to find Frank, the speedometer and the rev counter are on 0.
Suggested correction: I could not see Will's speedometer or tachometer (RPM gauge) during his drive to Frank's. What I did see (and believe you saw) was the patrol officer's instrument panel while he was parked along the road using radar. This was before he pulled out to chase Will's speeding SUV, so both gauges should have been on the far left (i.e, on "0"). [00:46:28].
Revealing mistake: When Damian knocks Lee Remick over the balcony with his tricycle, five big goldfish in a bowl get knocked over, too. But the fish don't move; they don't flap around like fish do out of water. They are obviously fake fish.
Revealing mistake: You can see Jackie's knuckles are already bloody BEFORE she starts pounding on the closet door.
Revealing mistake: When the police dog wants to attack Swagger and bites the cop instead, it's obvious the cop wears thick protection under his coat sleeve. (01:03:20)
Revealing mistake: While driving the Mercedes to the house of grandma, the gauges on the dashboard show speed is zero and the engine is cold.