Factual error: When Austin Powers is in the casino and plays blackjack with #2, the sequence of the blackjack hand is dealt wrong. (00:28:55)
Factual error: A minor only has a certain amount of time (typically, 6 months) to invalidate a contract entered into when such person was underage once that person turns 18 (or the age of emancipation in that state). This brings up a plot hole: If the marriage was not invalidated because Samantha Cole was underage, the prenuptial agreement would not be either, and Fletcher could not have used that argument to win the case, since he specifically states that she was seventeen at the time of her marriage.
Factual error: After checking-in at the Mirage, Clark is sitting by his hotel room window admiring the northward view of the strip. Based on the view he must actually be sitting at the nearby Treasure Island hotel.
Factual error: Although cars are seen driving on the right-hand side of the road for most of the film, one overhead shot shows UK-style "give way" lines across the left-hand side of the road.
Factual error: On 26th May 1989, the Liverpool v Arsenal game kicked off at 8pm, which meant it would be 9:50 at the earliest before the end of the game. Sunset was at 8.59 that day (I checked!) so why is it still light when they're celebrating?
Factual error: Visible lasers are never used as a security feature. (01:00:00)
Factual error: Why do the astronauts on Mars and the crew on Earth have the conversations as they do on the phone? A message sent from Earth would take about 20 minutes to arrive at Mars and vice-versa.
Factual error: When Tommy Lee Jones is looking at his wife on the computer, he had typed in Truro (in Cape Cod, Mass.), but when he zoomed in, it was on the lower cape; Truro is located on the upper cape near the tip. (00:58:40)
Factual error: John Cusack arrives in Grosse Pointe, Michigan and drives through the downtown area while we hear Minnie Driver's voice-over. He not only passes some storefronts at least twice, but one of the storefronts has a large yellow and brown awning reading "Monrovia Beauty Supply," which is located in Monrovia, California.
Factual error: During the remote control car chase the bad guys' minivan drives directly over it at one point. From the view of the toy car, you can see a driveshaft running down the centre of the undercarriage, which would be impossible on a front-wheel-drive vehicle like the Nissan Quest they're driving, which use half axles to drive the front wheels.
Factual error: During Howard's "Thank You" speech to New York he gives NYC the gift of a live performance by AC/DC. The year was 1985. As the band takes the stage and launches into "You Shook Me All Night" we see Phil Rudd on drums. Rudd had quit AC/DC two years earlier and was replaced by Simon Wright. (Rudd returned in 1994, hence being part of the band when the scene was filmed).
Factual error: In the prom scene in which Romy and Michelle wear Madonna costumes, Romy is wearing her hair up in a distinctive ponytail assumingly inspired by the famous ponytail Madonna sported in her Blond Ambition World Tour. However, this scene is supposed to be taking place in around 1987 and Madonna did not wear that ponytail until 1990.
Factual error: At the start of the film, they are using an optical telescope for astronomy in daylight. This is not possible. The telescope is also far too small to be giving such a detailed picture.
Factual error: During the scene where Charlie's thug, Lo, is in the street with the homeless man and his "busket", Lo gets angry at him, pulls his Glock out and rakes the slide to chamber a round. However, in the next shots of Lo we see his Glock with the slide still back even though it should have returned to the closed position.
Factual error: When the Pest is in his girlfriend's house, and Gustav comes in, the pest has way too many bullets. The pistol he has holds one bullet, not 15 or however many he fired.
Factual error: The movie opens with the Academy Awards, which as everyone knows are held no later than late March. Then Howard's wedding is no less than a week later, at which point he accidentally outs himself and is subsequently fired. It's clear that the kids' graduation is no more than a week or two later (made especially clear by the fact that Cameron, rushing to town, gets there the same night of the wedding and then is still there at graduation.) But high school graduations are in June or, at the earliest, May - which last time I checked was more than a week or two after the end of March.
Factual error: When Buddy's owner chases Buddy and Josh, you can clearly see his car is in park.
Factual error: When J.T.T. encounters the moose, the boys say it's a female with her young. Female moose don't have antlers.
Factual error: When Brad is in the Mexican bar and he tries out his one sentence of Spanish that he knows, he uses the word "novia" which can mean either boyfriend or girlfriend depending on the vowel you use at the end of the word. The translation the movie uses is wife, but in spanish wife is "esposa" not "novia."
Factual error: In the scene where the Professor Phillip first sees his creation (Flubber), he states that Flubber is 77 degrees Kelvin. Theoretically speaking, 77 degrees Kelvin is extremely cold, about -195 degrees Celsius (or -320 degrees Fahrenheit). The professor was handling Flubber with his bare hand at one point so he should've acquired one heck of a cold burn.