3Various Androids Built for Service Have Inexplicable Super Strength
Androids are featured in the vast majority of science fiction movies. If the picture is set in space or in the future (or both), there's like an 82 percent chance of android. Generally, these are synthetic versions of people created for a very specific task -- Data on Star Trek: The Next Generation was designed to serve on a starship, David from A.I. was made for serial killers who wanted a child that never aged and Pris from Blade Runner was built for sex (in all likelihood, so were the previous two).
He's about to insert his thumb drive.
The androids are then given thoughts, feelings and emotions (even dreams, in some cases) and set loose in their various industries to behave pretty much like human beings, only without any pesky civil rights to get in the way. We are free to order them around and bend them to our every whim. They, meanwhile, are free to bend steel bars with their bare hands:
"OK, let's just go ahead and deactivate the handjob function."
Yes, the beings explicitly designed for occupational enslavement were made not only every bit as emotionally volatile as an actual person, but also 10 times stronger. This isn't just one or two cases, mind you -- androids have spider strength pretty much across the board.
It would be one thing to give rhinoceros might to a battle android or something like that, but why in the hell does Lieutenant Commander Data, the science officer on a starship, need to be able to twist metal into balloon animals? He was built to be close to humans at all times, and is on a never-ending quest to become more human and feel human emotions (this only results in him turning evil like half a dozen times). Why give him the ability to have his feelings hurt, as well as twirl a Mazda Protege on his index finger? Captain Picard might as well leave a stack of pre-signed incident reports on his desk.
"Okey-dokey, it's now time for me to pull your head completely off of your pussy little body."
In A.I., David gets scared and latches onto a kid at a pool party, nearly drowning him as his robot weight drags them both down. It takes three grown men to pry loose David's terror grip on the struggling child and pull him to safety. Again, David was ostensibly designed to be around young kids -- why in the bejeebus would they equip him with an alligator death clamp that could crush James Gandolfini's ribcage, let alone that of a first grader? Make him really good at checkers or something, don't give him the strength to tear the babysitter in half.
And Blade Runner's Pris, whose only purpose for existing is to have sex with people and then die after four years, was also given the ability to kill men with back flips and thigh clenches for some reason. Although in this case, we can sort of understand how the mistake was made.
"It's gone mad! Quick, somebody call Ric Flair!"
And when they do make a huge battle robot, it has the opposite problem ...
2The Iron Giant Is Unstoppable (as Long as It Doesn't Bonk Its Head)
In The Iron Giant, a young boy playing in the woods comes across a colossal amnesiac space robot whose head was damaged during a meteoric skydive down to Earth like Tony Stark swooping in to sing the national anthem at a lingerie football game.
The two become friends until the dent in the robot's iron head eventually pops itself back out, causing it to immediately resume its mission (and entire purpose for being sent to our planet), which is to kill everything that has ever lived with approximately all of the guns in the universe.
"Oh, now I remember. Fuck you, kid."
Not only is it a terrifying harbinger of doom (because whoever sent it will probably be stopping by to check on its progress before too long), but it's pretty much indestructible. The army throws everything they have at this mechanical titan: tanks, battleships, the love of a small boy and a nuclear missile. None of it matters, because even if the robot is blown completely apart (which it totally is, by the nuke), its individual parts crawl back together and reassemble like the T-1000 (it really was the perfect robot, we can't stress that enough).
The best weaponry the 1950s has to offer can't even scratch the Iron Giant, which is baffling considering that we already know that all it would take to scramble its robo-brain is a bonk on the noggin (which you may notice could be accomplished by the best weaponry the Three Stooges have to offer).
"Bwoo bwoo bwoo bwoo bwoo!"
The Iron Giant's skull dome is a clear exploitable weak point -- it even tucks down beneath a protective shield when the giant goes into battle mode, which suggests that its alien creators were both aware of this shortcoming and designed it that way on purpose. Why, during the whole "construct a plexiglass bubble for Deathbot's cranium" phase, did no one clear their throat and ask why the hell they were even giving him a head in the first place?
Think about it. The robot is built exclusively for destruction, and when in destruction mode, its head retracts like a cold, frightened penis and must be protected at all costs. Wouldn't it be easier to just not have a head? Seriously, it's not like aliens sent a 20-story robot to Earth to blend in. For that matter, why is "destruction" even a separate setting if killing everything in space-laser range is the robot's sole reason for existing? It should just be a huge metal box with guns sticking out of it, all of the time. Put the important programming chips and memory banks in the center of its body encased on all sides by 100 feet of interstellar steel. What you should absolutely never do for any reason is put your murderbot's most delicate circuitry in an obvious extremity molded directly after the most sensitive anatomical area of the beings you are trying to destroy.
"We've placed all of his pain sensors in the crotch area. Hopefully nobody fires a missile into it."
It doesn't even get to that point, though -- the Iron Giant gives himself brain damage like a Chevy Chase routine and spends most of the movie behaving like Arnie from What's Eating Gilbert Grape? because apparently the aliens decided to include "Play hide-and-seek with a latchkey kid" in its default programming string.