In one religion (lets say Christiananity) you kill someone youll go to "hell". But before you die, you switch religions (i dont know whats a good one) and what you did will sned you to "heaven".
Its all made up to make people believe in something so theres a reason for everything and they wont go insane.
THe file cabinet is a model for that sequence in the beginning of HL where the scientist gets killed by a head crap. The file cabinet falls over on top of it.
THe dead osprey didnt fly either, it just sat crashed on the ground.
I dont think your looking at the right HL folder. You have very strange models...