Continuity mistake: In the scene where the crooked sheriff is about to throw Kiefer Sutherland off the train, the sheriff doesn't have any blood on his trouser leg, but if you check the shot right before then, he does have blood on his trouser leg.
Continuity mistake: Sailor Ripley and Bobby Peru are robbing the Feed Store in Texas. Bobby says "Say cheese" shooting one of the two men. We can see that his right hand is blown off. Cut to a shot of the two men searching for the hand and the victim has a bloody left stump. Then the store dog runs out with a right hand in its mouth.
Continuity mistake: While Reverend Bacon is accusing District Attorney Abe Weiss, the TV remote control that Weiss is using switches hands between shots.
Continuity mistake: When Joey meets the girl at the disco, when he lights her cigarette, she doesn't have her drink in her hand. Her right hand stays raised, with the cigarette, the whole time; but then one shot later, she's holding her drink and cigarette.
Factual error: When Bill Cosby (as a ghost) goes to the doctor and the doctor checks his heart (which is not beating), Bill Cosby then presses play on a tape recording of a sound of a beating heart. The doctor hears this through the stethoscope, even though the tape recorder is behind Bill's back, which is not possible.
Deliberate mistake: After Ryan and Michelle finish changing the flat tire and are surprised by Leatherface, he chases Ryan around the back of the car and smashes the windshield. At the moment the camera is in the backseat shooting out, we see the chainsaw with the chain popped off and hanging. My best guess is that it was done intentionally (for safety reasons) because the saw was close to Ryan. The crew must've been too lazy to completely remove the chain and just popped it off the track instead. (00:25:25)
Plot hole: Georges repeatedly tells immigration officers about his Africa trips. This overlooks that fact that INS would have or request a copy of his passport to process his case. In real life, INS would have realised immediately that the Africa story was not real: no entry/departure stamps in his passport.
Continuity mistake: At the end of the show Damon throws his mic to the floor, and it cuts to a close-up of the mic breaking apart in to several pieces. In the next wide shot the mic is lying intact on the floor. (00:55:45)
Continuity mistake: When the zombie Barry falls on Jordan, he's played by an obvious stunt double who isn't wearing any zombie make-up.
Continuity mistake: When Gatou Vardebedian is holding Gus Cardinale at gunpoint, the gun keeps changing position between shots (under his throat, by his nose...) and she is holding it straight or turned sideways. (00:13:00)
Revealing mistake: At the start of the film, where West and Cain are re-animating dead soldiers, one of them tries to kill West. So, he shoots him in the head. It's obvious that West's gun doesn't fire, and the soldier just pretends like he's been shot.
Continuity mistake: Kari and Traci are both wearing sandals barefooted when they are caught toilet papering the house by Tom and Finn but when the four of them go for a walk on the beach minutes later, Kari is now wearing grey sneakers and Traci has black socks with her sandals.