
Continuity mistake: Hester's estrange husband mistakenly kills a man at the end, and you see him cut his hair and his scalp off, then later when people find his body (after his suicide) his hair and scalp are intact. Then later you see him with the hair and scalp in his hands again.

Revealing mistake: A horse gallops through a field and you can see a telephone pole.

Continuity mistake: Chili Palmer goes to DeVito's house and parks his mini van next to the curb facing one direction. When Chili gives DeVito the keys for a test ride, the mini van is now parked facing the other direction on the street.

Factual error: If you take the train from Paris to Cannes you won't pass the Eiffel tower.

Continuity mistake: Moving out to Sera, Ben is packing his things in a motel. You can see a half full glass standing on a bed table on his left. In the next shot Ben is pouring alcohol to an EMPTY glass filling it in 1/3 approx. In the next scene glass is half full again and in the next one - FULL. Eventually he is drinking from a glass full of alcohol.

Continuity mistake: When the incomplete second EAM is shown in the movie for the first time, its subject line states "nuclear missile launc..." However, when this same message is finally received at the end of the movie the subject line states: "terminate launch all missiles". If the first one had been consistent with the second this would have made quite a difference. (00:55:45 - 01:45:25)

Continuity mistake: As Brian lands the plane down to Bangor, his headset is on in a frontal shot, but in a reverse shot it isn't. (00:47:05)

Factual error: Angela Bennett finds the Praetorian's IP while using the PC in the Cathedral's bank: it's 23.75.345.200 - they want us to believe that this is an IP, but no IP can contain numbers greater than 255. [Common practice, like fake phone numbers, but still worth noticing].

Revealing mistake: When Two Face and Riddler enter Wayne Manor, and knock Alfred down. Alfred, unconscious, pushes the dinner tray aside, so the thugs can carry him into the closet. (01:27:55)

Continuity mistake: During the confrontation with Alex's stepfather, Damon Wayans forgot to remove his earring before shooting. Pay attention to his ears - you'll see an earring in one shot and then nothing.

Continuity mistake: In the first film, George refers to the tree that the family carved their names in as being in the front yard. In the second film, this same tree is referred to as being in the backyard.
Suggested correction: It is also established he can be scatterbrained when under strain, and he is often under strain, and there's no reason they can't have two trees for that purpose.

Continuity mistake: Stallone is eating a banana when he is on the computer in the Mariott. He takes a bite and the banana is smaller, then in the next shot it is bigger again.

Factual error: The suits worn by dangerous disease researchers would definitely never tear if the hose was pulled.

Continuity mistake: At Thanksgiving dinner when the turkey is spilled on her head. In one scene she is wet. The next scene she is dry again and then the next scene she is wet again.

Other mistake: When Michelle Pfieffer hands out menus for the restaurant in the class, they all read them out loud in English. Then when she takes Raul there, he says he can't read it because it's in French.

Continuity mistake: After Alice is knocked over by the paperboy she goes inside where Carol is pouring sugar in her coffee. Watch the amount of sugar in the container increase when the camera angle changes.

Continuity mistake: When Deebo is riding his bike to Craig's house the first time, one shot shows Deebo nearly on the driveway. Just then Smokey and Craig remove all their valuables. If this were true, Deebo should have seen these. But then in another shot, Deebo's bike is shown just coming onto the driveway. In that amount of time, Deebo should have been further up the driveway.

Continuity mistake: Jack Lemmon puts the cat in Walter's truck. We see a close up of the cat's paws scratching holes in the car seat. A long shot shows the cat picking at the seat again, but there are no holes in the seat anymore.

Continuity mistake: At the time they were all little kids, the veteran from the war (Brendan Fraser) gave them cigarettes. When the girls were leaving, Teeny took one last puff and stopped it out, in the next shot she throws down the cigarette again and steps on it. (00:45:20)

Other mistake: Whenever Helen Hyde turns back into Richard Jacks, none of the clothes ever seems to rip or stretch - they both have different body types.