Factual error: When Clark speaks to Jor-El for the first time in the Fortress, Jor-El says "I will have been dead for many thousands of your years..." Fine in theory - Baby Kal-El travelled to Earth at above light speed so time passed differently for him. However, as such, wouldn't Jor-El have seen Earth as it was thousands of years ago? Which also makes there a problem with all the things Kal-El was taught during his voyage to Earth, as Jor-El references Einstein by name, for instance, and he would not have existed at the point when Jor-El sent him to Earth.
Continuity mistake: The yellow getaway car crashes on the waste land then rolls over. After it has come to rest, the mounds of earth used to roll the car have disappeared. Also, the car's windscreen disappears. Just before the crash, on an inside shot, it is there, but on the outside shots it has disappeared.
Continuity mistake: Near the end of the film when Spider Mike is rescued from a town. The Rubber Duck's truck is damaged. It loses the bullbars on the front, and the windbreaker on the roof is flattened against the roof of the cab. Yet after leaving the town, in a series of shots showing the Rubber Duck's truck. The damage disappears or varies. The windbreaker appears fixed and so do the bars, but in the next shot just the windbreaker is fixed and the bars aren't. It continues like this through a montage and then in the next scene when it cuts back to a close up of the truck both are damaged again. (01:47:40)
Visible crew/equipment: In the scene where Brody approaches the group of teenagers on their smashed boats, the angle cuts to show Brody approaching seen as if from Cable Junction. At this point, there is a huge mistake. The teenagers' boats are clearly visible in the foreground, the kids have all completely vanished, and you can spot the cameraman standing on the boats quite clearly.
Visible crew/equipment: Near the beginning where Philo parks his truck after speaking to Orville who is taking Ma to do her driving licence, you can see a crew member (wearing a white cowboy hat and sunglasses) reflected in the side mirror of the truck.
Revealing mistake: In one of the river flooding scenes after the dam bursts, you can see a modern day vehicle (most likely a pickup truck) for a few seconds on a highway next to the river. (01:50:30)
Continuity mistake: There is one scene in the final earthquake as Ski and Sonny are driving around the city that's being destroyed - the Trans Am gets hit from the right side, hard enough to throw the car into a small skid, but seconds later there is no damage to the car, and nothing like that was discussed during the planning of the stunt. One has to wonder if that hit was unintentional and not scripted.
Revealing mistake: In the warehouse when Billy kicks one of the black-suited bikers off his bike into the stack of empty tin cans, black wires pulling the bad guy up off the bike and into the cans are visible.
Revealing mistake: When Katharine Ross pronounces the child dead in the hospital, she pulls a blanket over the child. The kid moves and flutters his eyes.
Revealing mistake: During the fight after Witty has been killed, Peiter throws a grenade that lands in a bush on the right of the path up which the enemy are advancing. However, the resulting explosion comes from the centre of the path and not as far away as the grenade flew.
Revealing mistake: While Billy and Eli are on the river, with Eli in the front and Billy in the background, pay attention to Eli's paddle. When it passes in front of Billy, you can see right through it to see Billy through the paddle. (00:56:25)
Revealing mistake: As the huge guardian goes to move off and chase Elle and Stella, you can see its shadow cast on the fake backdrop sky.
Factual error: At the end of the fight between Pai Chang Tien (the Old Man) and Shu Chin (the fan-wielder), Pai catches his opponent with his pipe on the larynx and strangles him to death. In his death-throes Shu Chin groans until he dies; but with a piece of wood pressing down on his windpipe, he realistically wouldn't be able to make such a pronounced sound. (01:19:10)
Revealing mistake: During the final chase between the son of the Sheik and the evil oil company henchman, Tomas Milian is replaced on the speedboat by a stuntman wearing a bad wig in some shots, and in other shots by the cutest little puppet that rides the cutest little toy boat. (01:23:00)