Revealing mistake: At the end of the movie, when François is waiting for Christine's call, he moves his hand just before the phone rings, as if somebody gave him a signal.
Factual error: At the beginning of the movie, Pecker is at the Washington Monument in Baltimore when he boards the 27 bus to Hampden. The 27 bus does go to Hampden, but the closest it ever comes to the monument is Howard Street, three blocks to the west.
Factual error: When Pellew engages the first French warship, he gives the order to his helmsman, "Hard to Larboard". In the 18th century, helm orders were given in relation to the position of the tiller, rather than the rudder. A helmsman would push a tiller in the opposite direction he wanted the vessel to turn. This practice continued even when a ship was steered by a wheel, so the man at the wheel would have turned the wheel to starboard..except that he didn't.
Continuity mistake: When Dennis is in the bathroom with Bill, snorting drugs, his hands change position between shots. In one shot, he'll have the spoon in the vial and the next shot it's out. Then when he takes the last snort, the vial switches hands and he doesn't hold the spoon.
Continuity mistake: Billy sits in the bathtub wearing nothing but his underpants. Later, when he is in the bath with his girlfriend, he's wearing a white undershirt he never had. (00:45:00)
Visible crew/equipment: When Antony is shot, the black wire pulling him back is visible for a short while leading from his shoulders up to the top right of the screen. (01:13:40)
Factual error: For a nurse, Reed Buccholz seems to have very little knowledge of medicine.
Continuity mistake: When Max and Freak go into the coffee shop, Max says hello to Mr. Hampton and puts three Baby Ruth chocolate bars down on the counter in closeup. Then it changes to a longer shot and Max puts the chocolate bars down again.
Continuity mistake: During the final fight between Cain and Todd, Todd breaks Cain's arm at the elbow and wrist. In the next shot Cain is staggering backwards as Todd winds up for another blow. You can clearly see that Cain's arm is fine and resting comfortably at his side. (01:24:13)
Continuity mistake: When Max is moving into Sam's house, Sam's cousin Andrea is standing on the stairs. There are about 15 different shots of Andrea standing there, and her backpack constantly shifts from being on one shoulder to both, back and forth.
Factual error: When the helicopter crashes in the water, it is most obviously dropped straight down from a crane. Even though it ran out of gas, the rotor blades would still be turning somewhat.
Continuity mistake: When Goldblum parks the car when having a flat tire, it's further away from the white line on the road than when he's changing the tire.
Continuity mistake: In the movie, Jerry Springer's character is named "Jerry Farrelly." However when he signs the pregnant woman's stomach, he signs his name as Jerry Springer.
Continuity mistake: When Mark and Robert are driving to the comic store you can see Robert's seatbelt over his jacket's right lapel, the shot changes a couple of times and each time it's back on Robert his seatbelt is gone. (00:37:45)
Other mistake: At the end of the movie, Brooklyn uses a bazooka to blow up the club. If you look at the bazooka, you can see straight through it, there is no shell in it.
Visible crew/equipment: When Marion is dead, you can see the camera panning back reflected in her eyes.
Continuity mistake: In the beginning of the movie where the baby is being born, the father's hand is shown with his hand on the mother's belly, then back at his side, then back on the mother's belly and back near his son again, with it being different in every shot.
Audio problem: When Julia and the girls are sitting with Eva discussing Bilal's disappearance towards the end, you can see Eva's mouth isn't moving in time with what she is saying.
Revealing mistake: When Suzi Amis is hanging from Howie Long's leg in the parachute scene, you can see that the stuntman is not holding on to his leg, but some kind of wire harness.
Revealing mistake: At the beginning of the scene where the Reverend sells the guns to Mel, Bobby is walking outside and it is rainy and stormy. But once he enters the motel room there is sunlight streaming through the windows. Then, in the next scene when he is outside with Rosie, it's stormy again. (00:34:00)