Very bad Signs.
An alien species with technology far beyond our own decides to invade Earth. They travel light years to reach our globe, with the intent of killing all of humanity.
But here is the catch- they can be killed by water. Yes, regular water. So, when picking a world to invade out of the millions in space, they pick the Earth. It's over 60% covered in oceans. The atmosphere over the planet is water vapor, with white fluffy clouds of water droplets, just waiting to rain down water on the surface. All life on this world are bags of mostly water. The sentient species is so dependent on water to survive we invented this thing called "plumbing" to bring water to us wherever we are.
And yet, this is the world they pick to invade.
And how do they invade? Do they stay in the safety of their spaceships and just spread a toxin in the air? or beam down robots? Or create gigantic monsters with sharp teeth to tear us apart? Or a trillion pretty butterflies with razor-blade wings?
No. They beam down for hand-to-hand combat.
They at least are wearing waterproof suits, and fight with laser guns, right?
No, they are stark naked, and fight with knives.
That would be like humans sending a manned mission to Venus that is, well, naked and caring knives.
Not only that, these advanced alien ships have to communicate with each other using CROP CIRCLES!! They don't have iPhones? ham radios? walkie-talkies? telegraphs? tin cans on strings?
M. Night Shyamalan seems to bat pretty much 50-50. If it's good, it is very good, if it is bad, it is very bad.
Signs was very bad.
"I see naked aliens!"