Factual error: When Sheriff Emmett Kimsey (Lou Diamond Phillips) and Dr. Sheila Casper (Dina Meyer) enter the mine shaft and fall down into the cavern full of guano, they light a flare. The flame would have caused the fumes to ignite.
Factual error: This film takes place on New Year's eve in the year 1981, yet between a couple of scenes, it shows the streets of New York filled with modern-day cars and taxis.
Continuity mistake: When Christine comes to Dr. Keener's door her hair is parted in the middle. The camera shows her from behind when she walks in, and we can see that the front hair is tied back over the parting, also in the next shot when she sits at the table. Then, after she drinks a glass of water, her hair is loose again. (00:08:10)
Continuity mistake: In the fox hunt scene Hippolyta is initially shown riding a horse with her dress firmly tucked under her. The following shot of her has the dress flying partially up around her waist and exposing a fair amount of flesh. The subsequent shots again have her dress firmly tucked under her.
Continuity mistake: Remember when Lisa Swanson had the Statue of Liberty on her head? Well, when they took a long shot of all the contestants the hat was gone.
Continuity mistake: When Martin shows Tim the alien gum, it's sealed under glass. But when Martin takes out the Venox 7 gum, the cover is gone with no time for it to have been taken off. (00:33:35)
Continuity mistake: At the end of the movie, when Portia and Andrew are lying in their "beds," they are holding hands. In all of the far away shots, Andrew's hand is on top, but in the close shots, it is underneath. (01:59:20)
Continuity mistake: Just as the final fight between Luc and Seth is about to begin, three computer panels are shown to display Seth's different approaches to crack the code he requires to survive. While the two LCDs to the left and right have the output of a brute-force algorithm simply guessing all possible combinations for the code, the CRT-monitor in the middle shows Luc's severely injured daughter which Seth offered to heal in exchange for Luc telling him the code. However, if you have a closer look at the screen it states "HEALING COMPLETE" (even with a blinking frame around it), although close-ups of the "Rejuvo-booth program" before (e.g. at 1:08:00) and after (e.g. at 1:09:24) this shot claim it to be "INCOMPLETE". (01:08:55)
Continuity mistake: When Maggie and Ike are talking outside at the luau, Ike's flower necklace is in a different place every other shot. (01:11:15)
Revealing mistake: When Jamie Lee Curtis falls into the fuel tanks, how could she be breathing? The gases would be too toxic for her to breath, and wouldn't she be blinded by the fuel?
Continuity mistake: When Molly ties Tanya's whip around a bar to let herself down from the air duct, you can see as she slides down that the whip is knotted at intervals. But a few moments later, when the severed hand draws the whip back up, you can see that there are no knots in it.
Factual error: After the weird little man steals Jamie Fox's car, he starts to pull out of the station. You hear an unmistakable tire squealing sound. Unfortunatly the gas station had a dirt ground. It's probably been pointed out a few thousand times that you can't squeal tires on dirt.
Continuity mistake: When Ernest asks Meenor if she would like to play football, Meenor lines up the football then kicks it through Ernest's window which has a poster on it - the ball forms a hole slightly left of the face in the picture. When Ernest's granddad comes to the window and puts his head in the hole, the hole has now changed to the centre of the face. (00:54:05)
Other mistake: At the start of the film where Detective Dooley and Jerry-Lee are getting ready for work, we see Dooley climbing out of the shower, but in the reflection in the mirror behind him, we see him emerging and can clearly see his under-pants which are bone-dry. (00:00:32)
Continuity mistake: When Roberta is in Brian's apartment, she is putting curlers in her hair and then Brian walks in and they start talking. Roberta then stands up and Brian kisses her neck and as she turns around you can see the curlers have disappeared.
Continuity mistake: When Richie is running down the stairs, there's no vomit on left hand, but when he asks for a handshake from the policeman, there is.
Other mistake: When the one-legged judge bends over to retrieve his wooden leg from Paul Newman's grandson, you can see the judge's real leg and foot sticking out behind him.
Revealing mistake: When Whiplash is in the cave and Dudley comes and checks it out, the cave falls in. You can see a black curtain fall down while the screen goes black.
Other mistake: Right at the very end, when all the prisoners are standing in the room, it starts to slowly zoom in on Alice in the middle, but watch the blonde girl on the left of Alice - she starts laughing for no reason at all as Alice smiles to herself. I don't think it had anything to do with the film either, because it didn't show any reason why she would just start laughing like that.