Something like this happened in Fatal Attraction as well. Glenn Close and Michael Douglass are talking to each other while she is naked in bed. Different shots have her covered differently throughout the scene.
****Dewey Finn great minds and all:cool:
I’ve not seen the movie, but it’s possible he was headed to Canada for induction/flight training (assuming he was still in the continental United States, and not Hawaii), or simply to his POE for the sea voyage to Britain (or Canada).
The US volunteers who served in the RAF prior to America’s entering the war were known as the Eagle Squadron, BTW. The British were glad to have them, along with the Czechs, Poles, French, Norwegians, etc., who also volunteered in 1939–40.
Then in that case, it’s bad story telling. But I can’t believe in a movie where they really didn’t care all that much about historical accuracy in the first place, somebody said “Wait - he can’t board a ship to England, he’s got to get on a train to go to Halifax, then board a ship to England. Don’t want to get that wrong.” 
In the forgettable movie “Timecop” the Van Damme character says something like “We’ve carbon dated this gold brick and it’s over 800 years old.” and my husband blurted “You can’t carbon date gold, it was never alive!”
The invention of the L-shaped sheet was, unfortunately, a couple of years too late to save the Fatal Attraction production. 
In Some Like It Hot, set after the St Valentine’s Day Massacre in 1929, boxes of Ritz Crackers are passed around during the party scene in the Pullman. Ritz Crackers weren’t introduced by Nabisco until 1934. (All my life, I thought they were period on the basis of this movie. 
)
Negative, Ghostrider. What happens is that you see one shot from two different perspectives: Doc’s and Tom McClaury’s.
This is a fun story:
“Titanic” night sky adjusted after Neil deGrasse Tyson criticized James Cameron
In ET: The Extraterrestrial, the phases of the Moon as seen from Elliot’s backyard are completely wrong, something which Spielberg could easily have fixed in the last re-release (instead of bowdlerizing the dialogue and “enhancing” the aliens’ spaceship).
In The Two Towers, in the scene when the Riders of Rohan attack the Uruk-Hai camp at night, Pippin starts out with his hands bound, has untied hands when he screams at a horse rearing over him, and then his hands are bound again.
I don’t usually notice goofs like this, but it was really obvious.
He throws the gun down then goes into bullet-time (where he’s moving super fast), so you don’t see anything moving in real-time
Well that’s my excuse and I’m sticking to it!!
Years ago I went to the cinema to see some dreadful courtroom drama which Harrison Ford was in - I forget the name of it - anyhoos at some point there’s the customary scene where they come out of the court and a flock of journalists rush over to get a quote. One of them is holding up a tape recorder that doesn’t have a tape in it!!!
I bet he got the sack.
In the remake of Evil Dead after some idiot chucks the book down into the basement, Ashe needs to go retrieve it. He has by this time chopped off his right hand and replaced it with a chain saw. So you see him clonking down the stairs, reaching for, grabbing and tucking pages from the book under his arm … left hand, left hand, right hand, left hand :dubious::smack:
And even if it could be carbon dated, it went through a time machine.
In one episode of Firefly, Wash finishes a tricky bit of flying and shoves his rolling chair back away from the console to deliver a funny quip. He’s holding his hand out like he’s holding the control yoke for the ship, but the prop didn’t extend out far enough for him to move back (into camera view). So, rather than just letting go and having it look like he’s let go, he’s just sitting there with his hand out holding a phantom stick.
Correcting myself: I should have said that Ridley Scott removed several frames to get the desired effect.
As a birder, I often amuse myself listening to the background songs when a scene is set outdoors. I knew Last of the Mohicans was set in the Carolinas and not the upstate New York of the novel because I was hearing Carolina Chickadees, and not Black-Caps.
Btw, OP: I like the limitation of one-goof-per-post as it inhibits the dreaded listbot, the bane of Cafe Society threads… 
Also in The Untouchables, when the camera is slowly closing in on the car that Nitti has landed on (and in), you can see the shadow and reflection of the camera crew and rig. It’s not obvious, but you can’t unsee it.