I've noticed in movies that there are a lot of things that (hopefully) most people know just literally aren't true but they are so often wrong that we just accept them for the sake of enjoying the movie. Some of these things include:

• Various legal plot devices, like "oh, you didn't read him his Miranda Rights? He gets to go free then!" which is completely horsecrap.
• What hypnosis can do. In movies it's tantamount to mind control, when in reality it's nothing even remotely like that.
• Various firearm tropes:
  • "Silencers" in movies which are basically fiction. Suppressors exist but they are nothing like the magical movie silencer that reduces the sound of a gunshot to a mere whisper

• • People getting blown off their feet, through windows, etc by gunfire. It sure looks cool though.
  • How much ammo a gun holds. This is almost never based on the reality of the firearm but rather the drama the story calls for.
  • Cars that explode when you shoot at the gas tank.
• Subliminal messaging. Specifically the idea that inserting single frames of certain images can influence people on a subconscious level. The whole idea was a hoax perpetrated by a guy names James Vicary as a marketing stunt, and he admitted it when nobody could reproduce his results. Interesting side note: Even though it's crap, the FCC still made it against regulations and anyone who tries it might lose their broadcast license. Their logic is that regardless of whether it works or not, it's "contrary to the public interest" so it's not allowed regardless.
• Pretty much anything that has anything to do with computers and hacking.
• The idea that you use a defibrillator to restart a stopped heart. That's literally not what they are for, but that's how they are used in nearly every movie and TV show. But goddamn if that scene in The Abyss wasn't one of the best movie scenes ever.

There are of course additional technical ones like "that's not how you pick a lock" or "that's not how you make a bomb" but obviously most movies aren't trying to teach you how to do those things so a little bit of in-authenticity isn't necessarily a bad thing.

Are there any ones that you can think of? Not minor technical or continuity gafs but something that fundamentally works differently in movies to how it works in real life.

-Byshop