Hacking. Each and every time it is part of a movie or TV series.

Boffins coming up with a magical new solution to a problem that they somehow know will 100% work despite having done zero experimentation or testing.

Hacking.

There is no way that you keyboard danced for 12 seconds and completed a nmap scan, identified an unpatched target with a remote code execution bug, delivered the payload, pivoted to an account with the permissions you needed, and found the server running the internal application you are looking for.

Stuff falling towards earth from a spaceship/satelite.

You're already in orbit, things might wander away but it won't be attracted in any specific direction.

I just fired a gun right next to your head, neither of us was wearing ear protection, and now we're having a conversation at normal volume and we can understand each other just fine.

Bonus points for grenades going off indoors, and nobody having a concussion after.

Hacker shit. Some lone genius passing through systems intended to be secure for militaries and governments. It's not about details being stupid, that's to be expected. It's about the very fact of power imbalance.

Random characters challenging militaries and governments and just "quickly finding" some qualified assistance in doing that. And winning. You don't. You are an amateur and they are professionals. And if you want to do that, you are likely already under personalized surveillance.

That last thing is a trope from a free society where some people on the top are bad. And fighting them you can find help and learn, because in some sense you are protected, and guaranteed privacy and safety. There are no such free societies on our planet right now. The closest you can get is probably to join Hezbollah or some mafia, that is, well-established powerful organizations.

On the contrary, Luke Skywalker taking a lucky shot at a vulnerability that a team of engineers and military men, all of which were high-level Imperial defectors, with support from many planets of what is the Star Wars alternative of Western Europe and North America, had found by analyzing space station's stolen blueprints, using computers and what not, is realistic. Similarly to the Empire (at that moment with kinda democratic Senate and all) being fine with anyone on the way being murdered trying to contain such high-value corpus of information.

Again, I love Star Wars so much. A lot of the materials written in AotC and RotS time describe very well, in my modest opinion, how the real world oppression really works and how you can't really escape evil or defeat it. The best you can do is survive till that evil dies on its own, but the realistic best is planting the seeds for that time.

In general everything showing fighting your enemy as something easy, impressing upon audience that if it didn't work out in a month, then you just give up and do something more pleasant, deceiving yourself.

At the same time the sheer extent to which personal brilliance and hard work and persistence can change the world is often downplayed in movies. Drastic changes made by characters are attributed to magic or being in some unlikely situation. But the whole reason for previously described power imbalance is that professionals perpetuate their knowledge and understanding every day, and if one's persistent, one can beat them.

Yes, I like fiction about justice and fighting evil.

So many.

Normal people get slammed into a wall by monster, explosion or whatever, stand up and walk away. Buddy, you don't walk that off. People die or need months of recovery from less.

Don't get me started on the speed force. You do some napkin math and see the Flash is taking on a 1000G running in circles close to mach 2 without blinking and then gets knocked unconscious with a single punch in the next scene. Flash is not the only one of course.

And the lone inventor developing a fully conscious AI in some mountain cabin on an old laptop. It was clear that would never work and reality now shown us AI companies looking into nuclear powered data centers to speed up things.