Revealing mistake: In the fight scene at the pier, after Freddy and Jason get thrown into the air by the carriage that smacks into them, they land on the pier in sort of slow motion. Watch Jason's left knee as he lands, you can see a kneepad.
Revealing mistake: When John Cusack is driving the actress, there is a shot looking over his right shoulder at the dashboard. The speedometer reads 0 mph. (00:08:15)
Revealing mistake: When Erin gets into the truck, in the next shot the camera backs up a little and you can see that it's only raining on the truck.
Revealing mistake: When the pickup truck stops short and the Creeper goes through the cab, the truck flips over frontwards. If you look near the rear axle when it flips over you can see the puff of white smoke and the cylinder that helped to flip the truck.
Revealing mistake: When the camera shows the coffee cup in the cop's car, you can see the ignition is in the off position. (00:09:16)
Revealing mistake: In several scenes of the zombies swimming under water, they are obviously holding their breath. Would a dead zombie need to do that?
Revealing mistake: When Robert Downey Jr. is taking Halle Berry's blood pressure, the needle doesn't move as he pumps the hand inflator.
Revealing mistake: When Selene notices the sword laying on the rocks, the sword moves up about two inches between shots, you can judge it by looking closely at the handle of the sword. (01:49:25)
Revealing mistake: At the beginning, when the grandma zombie knocks off that guys head, a geyser of blood pours out. When the body falls forward and the blood splatters the camera, the body lifts up about three centimetres before it falls down, indicating that it is a dummy.
Revealing mistake: When Maggie is chasing after the truck in the light aircraft what appears to be a "pasted-on" face in the cockpit, on closer inspection (with zoom feature on DVD players) is a male pilot flying the plane.
Revealing mistake: When Morgan Freeman is about to take off in the helicopter to chase after the other two chasing Mr. Grey, one of the soldiers who is running to try stop him runs over a small pile of snow. The snow has a very unusual springing nature, obviously the springboard for the stunt, then as a result the soldier falls over.
Revealing mistake: When Shuya impales a commando with a pipe, the strap holding the pipe in place is visible, when he turns towards the camera.
Revealing mistake: When Frank yells stop to Marion, you can see the marks on the road from a previous take. (01:05:20)
Revealing mistake: In the scene where they are at the rooftop escaping from the snakes and at the part where the mom screams, you can see her smile a bit.
Revealing mistake: In the scene where Chris is hiding under the bed with Eliza Dushku and the mountain men bring in the corpse of the red-haired girl who was nearly decapitated by the barbed wire and dump it on the floor, the 'corpse' is still breathing.
Revealing mistake: When Gypsy tries to hit Helen with her weapon, she misses and hits a table instead, causing one of its leg to break off. However before the weapon even hits the table you can see the leg coming off from the table; obviously being pulled off.
Revealing mistake: Near the end of the DVD version, one of the main characters (I think Deke) is chainsawing the spiders. In two of the shots, you can see the man's legs through the spider.
Revealing mistake: When Otis cuts off Bill's hand, you can see it's a fake hand because it turns sideways after the first swing of the axe.
Revealing mistake: When the two survivors get in front of the emergency door, their hair gives out all sorts of chromakey artifacts. (01:21:00)