Continuity mistake: When Laurence asks Colin for a cigarette in the screening room, he has it between his fingers when Colin lights it, but when the shot cuts, his fingers have disappeared from around the cigarette. (00:45:30)
Continuity mistake: Late in the movie, when Anya says goodbye to Patrick, she takes off her wedding ring and puts it on the table before leaving the café. In the next scene, her wedding ring is visible on her hand throughout her call from the phone booth.
Other mistake: The initial view of Barrett's hospital room shows the lower portion of an IV pole. Barely visible IV tubes are hanging down, alongside (or touching) the pole. After briefly shifting to Sonny, there is suddenly a full IV drip bag. The IV tubes are no longer flush with the IV pole - they stick out on both sides and loop at the bottom. Also, the IV drip is not connected to Barrett. (00:50:29)
Continuity mistake: At the beginning of the film, protesters chase Harold through downtown traffic until he dives into his friend Todd's vehicle; whereupon the protesters urinate on Todd's windshield and splatter fecal matter across his driver's side window. For several scenes thereafter, the fecal splatter repeatedly changes shape, orientation and quantity on the side window, actually gaining mass in some shots.
Factual error: Danny Greene has a bomb placed in Shondor Birns' car. As Birns is waiting to cross the sidewalk, the pedestrian walk-don't walk sign is a modern digital sign, that was not around in 1975.
Continuity mistake: The designated Pope has just been visited by a physician. Three cardinals want to take a stroll outside for some sweets and arts. One of the cardinals stands and rebukes them; you can see that the cross on his chest has its chain caught in a button of the vest. During the rest of the scene the chain is caught in that button in the closer views and is loose in the wider angles. (00:23:50)
Plot hole: When Sam first encounters Dan, the headmaster, Dan reveals that he had to quit his musical career when he impregnated and married a groupie, but that he loved his daughter. Later, Sam runs into Courtney behind a liquor store, and Courtney, who is actually Dan's above-mentioned daughter, discusses her "aggro older brother". If Dan's original error in timing resulted in a daughter, how could she have an older brother?
Continuity mistake: Towards the end of the movie, the kids run upstairs to get changed into their PJ's. However, the girl, Blythe, is already wearing her PJ's and a second earlier was wearing her skirt, blouse and tights.
Continuity mistake: In the scene where Lily is hiding behind Thomas' computer desk, she uses her little Eiffel tower necklace to put inside the socket to short out the power. When she goes to put it in, you can see the computer is plugged in on the bottom socket. After a really quick cut scene, the computer is now plugged in on the top socket. (01:05:00)
Other mistake: At the beginning of the thrill race, Judy announces that it is Tuesday, July 7th. If July 7th was on a Tuesday, August 4th (the day Rocky performs in the circus) would also be on a Tuesday. However, the fact that Judy and Stink went to a bigfoot meeting (and then had a stake out) the day before they chased bigfoot, found Mr. Todd, and went to the circus suggests that August 4th was actually a Wednesday, not a Tuesday, because Zeke says at the beginning that bigfoot meetings are on Tuesdays.
Continuity mistake: Dr. Mario Tirelli at the beginning of the movie enters the clinic where he works. A blonde woman walks in the opposite direction and exits through the door as Tirelli briefly hails a nurse. At the cut, Tirelli is in the same spot as before (nothing changes in the background) but the blonde is back and with still a way to go before the door, and the nurse is far back too, with the doctor's hand not moving to greet her, in a different take entirely. (00:03:00)
Factual error: In his crude attempt to replicate the Human Centipede surgical procedure, Martin employs several handyman tools, including a carpenter's staple gun (using T50 staples as sutures). Problem is, carpenter's staples would never join soft human body tissues, they'd pull right out with little effort (T50 staples only join to very solid base materials, such as wood). Martin's victims, hysterical as they were, could have freed themselves from the T50 staples almost immediately.
Continuity mistake: Kate's stockings change colors, from black to beige, while she's running late to work. (00:12:10)
Deliberate mistake: The driver's side mirror would not be able to capture the view of the store that Monique is robbing - the mirror is slightly angled towards the rear of the car, plus Arthur's car is parked too close across the street. (00:00:33)
Revealing mistake: When Anna's looking at her reflection in the mirror she starts rubbing her face vigorously. Look at her right cheek and you'll it's red before she rubs, result of multiple takes.
Continuity mistake: In the 'match' when he tags with John Cena, Fred is picked up by the rival vampire in a fireman's carry position (kinda like for Cena's Attitude Adjustment), but his head is over the opponent's right shoulder in the first, wide, shot and towards the left shoulder in close-up.
Factual error: The young priest sees images of a red-eyed horse, but later, it is referred to as a mule, which looks much more like a donkey.
Factual error: The car doors wouldn't protect Adam and the other police officers from being shot - they offer no protection against bullets.
Continuity mistake: At the start of the film, when the bus driver helps the man in a wheelchair onto the bus, his hat disappears then reappears. (00:05:00 - 00:06:00)
Factual error: When Mitch Albom is with Rabbi Albert Lewis in his rabbinical office/study they discuss an empty folder on the rabbi's bookcase labeled "God". Religious Jews as this rabbi was, know not to spell out the deity's name, but write it as "G-d" instead.