Writing movies is hard. We're guessing it is, anyway, because there seems to be a lot that can go wrong. For instance, occasionally in a movie the characters will wind up in a jam where they can be rescued only by some new science, device or technology. Then, once they're out of trouble, the tech is usually immediately forgotten.
The problem is, sometimes the device or technology itself should have been far more important than what the heroes were trying to accomplish in the movie. Consider ...
7Spider-Man Has Gene-Splicing Spiders
Before teenager Peter Parker becomes Spider-Man, his class goes on a field trip to a genetics laboratory. A tour guide explains that they've genetically engineered 15 superpowered spiders. When one gets out and bites Peter, the venom rewrites his DNA to give him all sorts of weird spiderlike abilities. He stoically accepts the ramifications of being part-spider for the rest of his life.
"I have seen my future, and it involves a pian- oh what the fuck, Sam?"
Hang on a second ...
Uh, Peter, you don't think somebody needs to know about the spiders? You know, the fact that scientists have accidentally created something that can completely and irreversibly rewrite DNA with one bite? That would make them pretty much the most dangerous creatures on the planet. Think about it: At best, the results are unpredictable -- who's to say the next victim won't just turn into a deformed horror instead, or die -- but at worst, the bite victims will gain superpowers and maybe also become deranged or violent. These spiders could easily transform any person into a weapon of mass destruction.
Who wouldn't let this thing bite them?
And clearly the scientists didn't know the spiders could do it -- when Mary Jane pointed out that one had escaped, the lab didn't exactly go into lockdown.
No, only Peter knows, and he doesn't bother to tell anyone. And it's not out of ignorance; it's clear that Peter is some kind of science prodigy, so when he suddenly develops spider-powers immediately after being bitten by a genetically altered spider, it's unlikely he chalks it up to coincidence. It's not like he just developed a rash; a single spider bite rewired his genome. Yet the rest of the film is devoted to Peter's efforts to impress a girl.
You could say that Peter is afraid of getting turned into a human guinea pig or is afraid of divulging his secret identity. But nobody knows Peter got bitten; he can make the announcement as Spider-Man. He can write a letter to the lab on Spider-Man letterhead saying, "Guys, look at the venom of those spiders under a microscope. It's serious shit. And wear gloves when you handle them. Also, enjoy your Nobel Prize."
"For outstanding achievements in giving absolutely everyone superpowers."
6Star Trek (2009 version) Has Eliminated the Need for Starships
After young Kirk gets marooned on an ice planet, he enlists the help of Spock Classic and young Scotty (who are there for no adequately explored reason) to teleport aboard the Enterprise.
Hang on a second ...
For about 40 years, smartasses have been saying, "If the transporters have the ability to teleport people from place to place, why do they need ships?" And, through every episode and every film since the 1960s, the show explained it away as the transporters having some basic limitations: namely that they have a relatively short range -- only 40,000 kilometers, max. Essentially, it's useful only for getting on and off the Enterprise without the producers having to acquire the kind of budget they would need to animate the ship actually landing.
Above: Roddenberry's gift to screenwriters.
Now, the 2009 film has a major plot point where Kirk needs to be teleported onto the Enterprise, but the Enterprise is moving at warp speed at the time. Scotty figures out a way to do it, and the movie celebrates this achievement as being the first time anyone has ever been transported to an object moving that fast. But that isn't the point.
The Enterprise is shooting off at Warp 3 just before Scotty and Kirk beam aboard. Warp 3, by the way, is 27 times the speed of light. Or 5 million miles a second. That means that by the time Kirk has finished saying, "I really liked you in Shaun of the Dead," the Enterprise would be out of the solar system. A distance Scotty has no trouble overcoming with his transporter.
So, uh, why do we need spaceships again?
For the same reason we need classic cars and the Beastie Boys.
The characters don't seem to realize that what Scotty has actually done for space travel here is what e-mail did for the envelope industry. Any means of transportation that has more than zero mass and moves slower than literally instantaneously has suddenly become obsolete. We're only halfway through the first film of a new Star Trek franchise, and already we don't need the Enterprise anymore. By the time Picard is born, spaceships will be a relic of an older era.
Basically, they'll be the Star Trek equivalent of Betamax.