At the end of the film, Ray comments on Carol's shorter haircut. In her last scene, her hair is back to its original length.
After the explosion, the bandage around Ray's head moves up and down.
In the breakfast scene Art recalls his conversation with "the real estate broad that sold them the place". Later, Dr. Klopek describes killing the Naps and taking the house from them. If this were true the house would not have been put on the market and there would not have been a real estate agent to speak with.
When Ray and Carol talk in their parked Jeep, the headrests are missing. They appear as they pull out of the driveway.
During and after the scene with the bees, Walter walks towards his door three times.
The antiquated "night vision scope" Mr. Rumsfield does not turn everything red when looking through it. That part of the scope is a red-lens flashlight. Infrared images appear black and white; black for cold, white for warm or hot.
The bird Art tries to shoot vocalizes like a crow, but is actually a raven.
When Dr. Klopek is ascending from the basement and they focus on his shadow on the opposite wall, the shadow behaves against the laws of physics. Since he is walking AWAY from the light source behind him, his shadow should be getting smaller. A shadow only gets larger if you are walking TOWARD the light source, with the shadow on the wall behind you.
IRAAG: This was done for dramatic effect to make his arrival more ominous and was an artistic decision that took a feat of moving light source behind him to achieve.
IRAAG: This was done for dramatic effect to make his arrival more ominous and was an artistic decision that took a feat of moving light source behind him to achieve.
Carol goes away with Dave (Carol and Ray's son) about halfway through the movie so that Ray, Mark, and Art can carry on with their plan to find Walter at the Klopeks' house. Later, after the house explodes from the gas main that Ray broke, Carol returns without their son who left with her hours earlier. Presumably, he stayed behind with the relatives that were mentioned as going to visit.
When Art and Ray are in the basement talking about the incubus and succubus, Art accidentally hits the lamp, causing it to swing back and forth. As the light slows down, a crew member hits the lamp again to keep it swinging.
At the beginning, when the paper boy is riding down their street, the camera gives a view straight down the street. The sign says "Mayfield Pl.", but it is positioned to show the cross street, not the street they live on.
After Ray walks out of the burning Klopecks' house, wires around the base of the porch supports can be seen pulling them back so that the roof collapses at that exact moment.
The tool shed where the Klopecks keep their shovels is on their side of the fence, to the right of the telephone pole where Art climbed up. Yet, when Art fell from the pole, he fell straight back but landed onto the Klopecks' tool shed, directly to his right, which he should have completely missed.
When Dr. Klopek is discovered as the murderer of the former neighbors, the Naps, the trunk of his car pops open. Just before Ricky Butler (Corey Feldman) points out the skulls and bones under the blanket, something under the blanket moves.
When Art goes up to the power line at the top of the pole, he is to the left of the shed in the Klopecks' yard. When he cuts the line, he falls backward, so he would have landed in Ray's yard, but mysteriously lands on top of the Klopecks' tool shed.
When Art jumps over the hedge into the Klopeks' yard, you can see that he jumps onto something that propels him over the hedge.
When the family sits down to breakfast, Art tracks some crow in his backyard with a Daisy pump action BB/pellet gun. He fires several shots that sound like a rifle.
There's a reflection (boom?) in the pool of water at end of Ray's driveway.
Walter rides home in a car with Illinois plates. One scene shows mountains in the background. Before the end credits, the camera zooms out on a map placing them near Des Moines, Iowa.
Art told Ray that he slipped a note underneath the Klopeks' door and Ray said he had also slipped a note underneath Walter's door when in fact he actually slipped it into the mail slot, not under the door.