Alien is the scariest movie.

You wake up groggy as all fuck because you're in the middle of goddamn space and you're supposed to be home. Then you have to go down to a creepy ass planet and that's how your bad day starts.

Then some godawful space spider rapes your face and everyone loses their shit, ignoring quarantine protocol and all that stuff because hey alien scorpions, you know? So you wake up again, super groggy and all, because now you're all full of alien shit and goddamn if I couldn't eat some huevos rancheros man and they're so good especially after all that weird alien nonsense and I'm just glad everyone is HOLY FUCK OW THORACIC TRAUMA

So then this wacky little worm with a mouthful of broken glass and syringes runs off and LIKE AN HOUR LATER it is like nine feet tall and eating your friends right in front of your face. So you go and get your plasma rifle- oh wait I don't have a plasma rifle because I'm a galactic trucker bumpkin. I mean you go and get a can of hairspray and a lighter and you basically hide in the corner from the evil killing machine in a little puddle of urine with your knees up to your chin. But that shit won't save you because that motherfucker is in the vents, which it will tear through like wet tissue paper. Oh did I mention that you're in space? So you can't run away? Also yeah there's the fact that this prick is full of serious ass acid blood at like 100psi so good luck killing it. That also kind of works back around to the whole being in a spaceship thing because of hull breaches.

Basically, Aliens will fuck you all over the place.