Factual error: Robin and Azeem land at the white cliffs and Robin says something like, 'Tonight we will dine with my father'. Those white cliffs are the Seven Sisters in East Sussex, about 200 miles from Nottingham. It would probably take about two weeks to walk it. They also reach Hadrian's Wall in the next scene, which is 200 miles further north than Nottingham.
Factual error: When Peevey gets stuck in the truck, Cliff fires up the rocket pack and simply pushes it clear. If the rocket pack can push out enough thrust to move a 2 1/2 ton truck, Cliff's body can't take that kind of stress. He stretches his arms out, starts pushing, and sets off the rocket, putting himself between the truck and an accelerating rocket demonstrably capable of moving it. The truck is stationary so has 2 1/2 tons of inertia. The rocket instantly accelerates it to an appreciable speed. Human arms cannot take that kind of stress. He's going to be crushed.
Factual error: The movie is set in the Middle Ages. Therefore, the traders who come to the Winterland to sell their goods must be quite ahead of their time to carry fairly modern lighters. (00:04:20)
Factual error: After JD steals Louise's money, Thelma decides to rectify the fact that they're broke by robbing a convenience store in Oklahoma. She holds the clerk at gunpoint, asks for all the cash, and then requests he hand over a bottle of booze. The problem is, due to the liquor laws in Oklahoma, one can only buy 3.2 beer and wine coolers at grocery stores and convenience stores, not "hard" alcohol.
Factual error: In one of the train cars on the way out west, upon being asked by one of his henchman, "When are we going to eat the mice?" Cat R. Wahl replies, "Which would you rather have, the crouton or the entire Caesar salad?" Caesar salad was not invented until the 1920's and the movie takes place in the late 1800's.
Factual error: In the second skydiving scene Patrick Swayze tells the pilot to fly the plane at 4000 feet, which he does as this can been seen on an altimeter. When skydiving from 4000 feet it would take 25 seconds before you hit the ground but the skydive in this scene lasts 1 minute 51 seconds.
Factual error: Leonardo's workshop is shown with a model of one of his flying machine ideas hanging from the ceiling. This is in 1481 but Leonardo did not start his studies into flight until about 1485. (00:01:45)
Factual error: In the beginning of the movie Chris starts up his BMW 733i and the camera pans around the interior of the car. Viewers see the tachometer, center dash stack, and the navigation screen. If you pause the movie and study the center dash stack, note that there is a Panasonic CD player. This CD player would have been an aftermarket install because a 1988 BMW didn't offer a CD player. Now later in the movie Chris is asked to put in a tape. Now there was no tape player in Chris's BMW. It was replaced by that CD player.
Factual error: In the scene inside Channel 3's open space, there are several wall clocks, but they are wrong. When it's 10:05 in New York it's not 3:05 in Frankfurt, London and Paris; besides, 3 clocks out of 6 which always point the same time is really wasteful - not that London is in the same timezone as the other two, but here they all point at the same time. (00:37:25)