Lack of continuity in movies.

@ninalanyon Surely someone watches the final cut to make sure all is well.
Astounding how many errors get through those Script Supervisors.

@Gusman It's not really to do with the script writers, but as you rightly attribute, the Continuity Supervisor. By the time it gets to the cutting room, it's too late: all the actors and crew are off on other projects. Normally only true pedants (like us?) notice these things. In Dirty Harry there is a famous scene with a bank robber lying on the ground with a rifle tantalisingly within reach and Harry invites him to consider how lucky he's feeling. Clearly shot twice (at least) from different angles, the rifle travels closer to and further away from the criminal as the two shots are juxtaposed. I only noticed on about my 5th viewing (it was a 'text' I taught) and I think few people would notice on a casual viewing.

@FreddieUK I enjoy finding errors like that in films.
The Universal monster films are full of them. Back then, it was likely due to budget and time constraints, but some appear to be just plain lack of attention.

@JSul3 You mean like Plan 9 From Outer Space? 🤣

@FreddieUK Plan 9 From Outer Space is a grade Z film by Ed Wood....not worthy of being considered here.

The Universal Frankenstein film series has geography issues.
'31 film: Goldstadt is the village where the Frankenstein clan live, in a huge mansion, not a castle as seems to be the case in '35 Bride.
Suddenly in '39 Son, the village is named Frankenstein! Here we have a huge castle, where a brisk walk will take us to the watchtower lab, that in both the '31 and '35 films, was in an isolated area, far from any village folks. Then later in '42 Ghost, the town of Vasaria becomes 'Visaria' in the later films.....and these are but only a few 'location' issues.

In '31 Frankenstein, Fritz steals a criminal brain, that's clearly labeled as such on its jar. Even if you assume Fritz tears off the label and delivers the unmarked jar to Henry, according to the lecture by Dr. Waldman, the criminal brain is shown to have obvious physical differences from the normal brain on display. Perhaps Henry wasn't in class the day it was taught or he was in such a rush to bring life to his creation, he didn't notice or care.

I could go on, but you get the picture.

@JSul3 Thanks for a great reply.