Continuity mistake: During the scene when Alan is trapped in the quicksand, and the others are giving him items to hold onto, you can see behind him, to the viewers right of the blue chair in the background, a small stack of newspapers. But in later shots, such as after Peter runs out of the attic to go to the shed, and we then see Judy crawl over and grab the wooden music stand, to hit the spiders, the stack of newpapers has vanished, and a few other items change position, like the tennis racket.
01:20:55 - 01:23:00Hamster
Continuity mistake: As Mrs. Thomas is being taken from her car, after being bitten by the mosquito, the men put her on a pedestal and you can see she is wearing long green boots that nearly reach up to her knees. Yet when they are putting her into the ambulance, she has black heeled shoes on.
Continuity mistake: After Sarah and Alan have been embedded into the floor by the quicksand, she rolls the dice with her teeth onto the board that's been propped up on Alan's face. The next time we see the board, when Peter's fighting with the spiders, the board's completely flat on the floor, when Alan's head should be propping it up. There's no angle between the main board and the two halves that fold out, but they are bent downward in the previous shot. Also, after Alan moves the board, at first it's relatively perpendicular to his face. Then, a few shots later when the spiders are retreating because of the impending earthquake, the board's rotated 45 degrees and moved farther away. It wasn't moved by rumblings from the earthquake- this is before the ground actually begins to shake.
01:28:15Chris Moyer Grice
Continuity mistake: After the stampede, Alan runs off, then so do Sarah and Peter, and then the phone rings, so Judy answers it. Down the hallway you can see a chandelier, barely swinging. Yet when it cuts to Judy answering the phone, the chandelier is swinging much more violently.
Continuity mistake: While Alan is handcuffing Carl to the police car, the sky is clear and the sun is shining from the left (driver's) side of the car (indicated by strong shadows). As Alan is tossing the cuff keys away, the camera cuts to a view of the back of the police car which was shot on an overcast day, with the shadows very muted, and the sun coming from the car's right side. The view cuts again as Alan turns to run back to the police car, and we're back in bright sunlight from the left side. A couple shots later, as the car is reversing into the quick U-turn, the sun is shining from the car's right side again, this time with strong shadows.
Continuity mistake: When Alan explains who he is to Sarah, she peers out through a door that's only open a crack. But when the shot cuts to Alan, his entire head and practically both his shoulders are visible through the door. When it switches back to Sarah, Alan appears to be at least two feet away (since he's totally out of the shot) and the door is still open the crack of a few inches.