Continuity mistake: In the devo chamber, when Toad is devolved the Advance sign is black. When they evolve Spike the sign is red. (00:36:20 - 00:46:45)
Continuity mistake: When Phil has the groundhog in the truck at the quarry and is about to drive over the edge, Rita's hair is disheveled and sticking out all around her head. But after Phil has driven off the cliff and she's looking down, it's all pinned neatly in place.
Continuity mistake: In the scene where Maggie goes to the restaurant with Bob, he offers her the case where the weapon is. Bob says, 'It's loaded'. Close inspection shows the clip chamber is empty (not loaded), and a cartridge clip is positioned beside the weapon in its tailored slot in the custom case. Maggie closes the case and says, 'I don't understand.' After Bob explains what she is to do, then leaves, Maggie opens the case again and suddenly there's a clip in the weapon (loaded) and another one beside it. The weapon was not loaded when she looked the first time.
Continuity mistake: When the girls are hazing the freshman and they're talking to Don, the first take his legs are up and crossed, then the next take they're down and crossed, then up, then down, and this goes on the entire scene.
Continuity mistake: You can clearly see the blood packet underneath his head right before he hits the ground.
Continuity mistake: Bernie gets shot underwater with the spear and can't let go of the chest. But when they take the vest off Larry to float Bernie up to the surface, Bernie takes his hand off of the handle to get the vest on.
Continuity mistake: When the waitress at Dottie's seduces Butch, the degree of boob exposure varies depending on the camera angle (not only due to perspective). (01:17:15)
Continuity mistake: In the second to last scene of the film, Michael Williams jumps onto a very long train pulled by southern Pacific Railway locomotives. In the last scene a pan shows a train rolling into the distance some hours later (the sun has come up) and the train is now very short and pulled by a Montana Rail-link locomotive. Either the train has seriously changed since we last saw our hero, or the director just took a pan of any old train in a setting he liked.
Continuity mistake: When Madonna has her legs wrapped around Willem Dafoe in the parking lot sex scene, in one shot she is looking down at him with a sly smile as if to say she's enjoying it; the very next shot she's got her head up looking as if she's in an excruciating amount of pain.
Continuity mistake: When Henry & Mark were chased by the dog, look carefully at the back of Henry's jeans and you will see a large dirt stain on it, but in the following scene over the cliff, there is a brief overhead shot over Henry and you will see that stain is gone.
Continuity mistake: When Walter (Robert Duval) is shaving Frank (Richard Harris), notice how the shaving foam on the upperlip disappears before the upperlip has even been shaved and then suddenly reappears in the next shot where the upperlip is shaved.
Continuity mistake: The bearded man sitting next to Jonah, on the flight to New York, is also seen sitting two seats away from Sam when he flies to New York chasing Jonah. The same guy is on two different planes at the same time.
Continuity mistake: When Joe, the Heisman candidate quarterback, jumps his Harley off of a dirt cliff, one camera angle is from below as the bike is in the air. The angle clearly shows the bike is different from the Harley he started and finished with. Most noticeable is the fact that the tyres on the stunt bike are knobby enduro tyres, but later when the bike is stopped, you can see the smooth street tyres are back again.
Continuity mistake: In the scene, towards the end of the movie, Billy Baldwin is running down the street chasing the cab that the girl he wants is in. His shirt changes from having a pocket to not having a pocket. The colour also changes from yellowish to more brownish.
Continuity mistake: There's a scene where Al ducks into a bar from a very wet and rainy night outside, and he's soaking wet. However a couple of shots later his hair appears perfectly blowdried.
Continuity mistake: When Merlin is about to strike the ice on the lake with Excalibur he first brings the sword up over his head. When he brings it over his head, his finger is over the hilt of the sword but when he brings it back down and hits the ice with it, his finger isn't. You watch him the whole time so if he moved it you would have noticed.
Continuity mistake: This movie has many flashbacks to the late 1970s or early '80s, but in one scene the little boy is in his pajamas and it depicts symbols of NHL teams. Half, if not most of those teams were not around at that time.
Continuity mistake: In the beginning when Topper is about to fight, he puts a red bandana around his head. As he is walking to the fight, one of the flaps of the bandana is draped over his shoulder. The shot changes when he gets to the fight, and both flaps are now behind his shoulders.
Continuity mistake: When Bessie is examining the cards she found under the desk, they constantly shift relative to each other between shots. (00:23:05)
Continuity mistake: When the bus is coming to pick up Alfre Woodard as she is finally meeting her son, we see Robert Downey, Jr. briefly touch her on the shoulder. Since she's a soul, this is impossible.