Revealing mistake: During the Miss United States Pageant, there are close-up shots of the audience and it is very obvious that in the balcony and back part of the audience, especially when seeing the 'men' with bow ties, they are fake - mostly cardboard cut outs. (01:22:50)
Visible crew/equipment: When Émilien is chasing after the Ninjas on foot, they jump from a bridge onto the top of an orange lorry. The orange crash mats that the 'Ninjas' land on are visible in the overhead shots. (00:47:35)
Other mistake: When Big Momma is taking a shower, you can clearly see that the shower head is a mirror, with the water coming only out of the top, and when Big Momma bends over, you can also see her reflection in the shower head. (00:12:00)
Continuity mistake: When Julia is trying to figure a way out the cell, she starting feeling around the edges of the glass panels etc., and she then comes to the end and stands by the green bench which is at the side of the cell. Julia's black heels sit on the bench, but then when Julia notices the pipe and climbs up to attempt to pull it, in the overhead shot her black heels have vanished from the bench. (01:08:40)
Other mistake: The Mexican newspaper that Michael Douglas is reading in the helicopter has a headline where all of the accents are missing. No newspaper, even a cheap one, would make such a typo error. (01:27:35)
Factual error: In the beginning, Leonard looks at a copy of John G/Teddy's driver's license. The expiration date is listed as 2-29-01, but of course, 2001 was not a leap year, so there would've only been 28 days in the month. (00:12:45)
Continuity mistake: When Gene Hackman is helping his wife zip up her dress her hair goes from hanging straight down her back, to being over her shoulder. It cuts without giving enough time to assume that she moved her hair.
Continuity mistake: When Memphis is driving Eleanor he backs up and hits the right rear-view mirror. He stops, leans out the window and sees that it is dangling. The very next shot it is back to normal and it stays that way for most of the rest of the movie. (01:34:34)
Revealing mistake: When Jill and Cynthia meet by the water towards the end, Jill produces her gun and is told to throw it in. As she's holding it you can see the base of the grip and there's no magazine in it - hardly the most effective weapon... (01:26:45)
Continuity mistake: When we see the police officer checking the hit counter on an adult web site, the hit counter goes down from 1,739,986 to 1,739,944 a few seconds later.
Continuity mistake: In the gas station scene after Ellen learns that Phil has drowned, she is so distraught she forgets to put the gas cap on and we can see it on the roof of her car as she drives away. But when she arrives at the police station we can see that the gas cap is on. (01:10:20)