10 Reasons There Are Only 2 And A Half Good Alien Movies

6. Everyone Is An Idiot

Horror movies require a certain quota of poor decisions among its characters to function, but there are limits. These limits are overstepped dramatically when the cast of Prometheus remove their helmets in an unknown biosphere, make friends with an alien death snake, and manage to get lost in a structure they have completely computer-mapped. Frankly, they deserve to die.

Added to this is a strange compulsion by whole casts to put their faces as close as possible to anything that looks like it might kill them, or at least be extremely gross. John Hurt can be forgiven, as he's the first and he was wearing a pretty sturdy-looking space helmet at the time. Billy Crudup has no excuses.