Revealing mistake: When Glenda is killing the mother in the shower towards the beginning of the movie the mother's underwear is visible through the shower curtain.
Revealing mistake: After Dr. Lawrence cuts off his leg and is crawling towards the gun, if you look at his dismembered leg, you can make out the shape of his foot hidden beneath his ripped up slacks. (01:29:30)
Revealing mistake: When Shooter pins Mort against the tree with the shovel, you can see that it's a rubber shovel because it's bending around Mort's neck. [Mentioned on commentary]. (00:40:45)
Revealing mistake: Nearly at the end, the scientists find Alice's body at the waterfall, one of the men lifts up the cloth to take a look at her face. Her face is badly burned on one side and she is pronounced dead. However, take a look at the left side of her neck, you can see her either gulp or take in a quick breath of air. (01:19:05)
Revealing mistake: When firing the crossbow, Van Helsing runs out of arrows, but the bow's canister is completely full of arrows. In the same shot the canister spins once and they all disappear. (00:25:55)
Revealing mistake: While Blade's dangling a familiar off the roof, the familiar's phone rings (a Nokia 5210). Blade looks at the screen and sees the doctor's name. However, the display we see is a Nokia phone book listing with only one entry, rather than the "incoming call" display.
Revealing mistake: In the beginning of the movie, where it shows the group of nodding zombies and the Shaun of The Dead logo is on the ground, look to your left, the zombie actor stops nodding and looks around him to see if the shot is still being filmed, and he immediately goes back to nodding. Look out for it, it's obvious. (00:03:45)
Revealing mistake: When the detectives were listening to the message on the answering machine, we heard it say the date was Thursday and states a time the message was left. When the camera shows the answering machine, you can see the display blinking between 1 (the current message) and CL (which indicates the time and date have not yet been set).
Revealing mistake: There is a wide shot of the ship were there is some equipment on the ice and some people moving around. The ship itself and the equipment cast shadows. But none of the moving people cast any shadows at all. (00:14:25)
Revealing mistake: As Ana is driving away from her home, when we see her car driving from a shot high above, we see a car crashing in to a gas station making a huge explosion. However the trees a few feet away from the explosion don't move. The shockwave would have made them react at least a bit. (00:09:20)
Revealing mistake: At the end of the movie, when the last "Graboid" appears, in one or two shots of him retracting back into the ground, you can tell the shots are reversed, as dirt is being sucked down in an unnatural way. It flies up and sort of "implodes" towards the creature. (01:23:50)
Revealing mistake: When Bill sets the tribe's hut on fire, everything lights up instantly and within moments the whole thing is alight, although it takes longer than that for a whole hut that size to set in flames.
Revealing mistake: When Richard hits Paul over the head with the candlestick, Paul reacts to the blow way before it actually connects.
Revealing mistake: After the power goes out at Sarah's hospital, she lights a candle. While she's walking along with it, it's obvious it's not made of wax. It looks like it's made out of plaster.
Revealing mistake: When the man is melting after being covered in acid in the beginning, you can see a wire pulling the "melted skin" off his arm, at the bottom of the frame briefly. (00:04:00)
Revealing mistake: When they fix the door, in the last few frames we see while the door is still moving up, the gear stops spinning in the "rail".
Revealing mistake: After Jonny Lee Miller gets shot in the head, he slowly falls into the water, facing Sara and Gabe. In the next shot, he has turned towards the water. If you watch closely, you can also see him turn his head so he doesn't hit the face on the water surface. (01:34:15)
Revealing mistake: After the El Dorado hits Boone's car and is just about to drag it, there is a quick glimpse of its front license plate. The letters are reversed, indicating that it is a flipped shot. (00:28:20)
Revealing mistake: Matt, the boy killed at the beginning, has very short hair. His dummy (the one hit by the white van) has much longer hair. (00:05:40)