6The Sixth Sense
Spoiler alert: Bruce Willis is dead. The whole time. We totally didn't see it coming and apparently neither did he. He's only able to figure out he's a ghost when he sees his wife drop his wedding ring.
But shouldn't he have figured it out before that? All the other ghosts in the film seemed to be wandering the earth, mindlessly reliving their deaths, with little awareness of the outside world at all. But ol' Bruce was just carrying on as normal, working and going about his day-to-day routine, completely unfazed by the fact no one but a small child had spoken to him in several months.
What kind of lifestyle was he living before his death that would make him fail to notice that no one could see or hear him? He assumes his wife isn't speaking to him because he's "neglecting their marriage." In the days right after he died, did he think she was mad at him for getting shot in the stomach? And what about everyone else? Does he also assume all waiters are suddenly assholes? That the girl at the supermarket check out finds him too hideous to make eye contact with? That taxis won't stop for him because he's balding?
And how does he get the assignment to treat the kid anyway? Nobody hired him, being a ghost and all. Does he just approach random children in churches and start giving them free psychiatric advice? That's no way to run a business, ghost or not, and we're pretty sure it will get you thrown in jail.
5Harry Potter and the Prisoner of Azkaban
At the end of another wondrous wizarding adventure, Harry uses a magical time-travel necklace to go back and save himself and his godfather from the evil dementors.
This is actually a problem in most movies that contain time machines. The movie treats time travel like this urgent thing: "We've made it to the past! Now we've only got a few minutes to go back and stop the dementors!" No you don't, you have as much time as you need. It's fucking time travel. If you mess up, just go back and try again.
"OK, thirty-seventh attempt..."
They also seem to feel that they have to do it immediately, that there's no time to wait. Of course there's time to wait, you've got a goddamn time machine. Do it tomorrow, do it in ten years. You already know you've succeeded, you were there when it happened. It's actually the only situation you could be in where failure is impossible. It's the least suspenseful thing imaginable, yet they treat it as the nail-biting climax of the movie.
The power to travel through time still wouldn't be worth
the humiliation of owning Harry Potter jewelry.
We're picking on Harry Potter especially for this because after they use the time machine that one time, that was it. For the rest of the saga, the entire wizarding world is under siege from a magical Hitler, and they never again find the time travel useful? Despite all the people who die in the Harry Potter series (and post Azkaban, they start killing them off like it's a Friday the 13th movie) he never goes back and saves any of them?