OK, I used to work for a major film producing company in the manufacturing of light sensitive film and paper products. Suffice to say, dark room work... so dark you can't see your hand in front of your face. The only real "light" was perimeter strip lighting along the walls for orientation. A buddy is escorting a new employee around the work area and in doing so, the temp would put their hand on the leaders shoulder "for safety" as you moved around the room. Fast forward, it's break time. He leads this poor European women (with broken English at best) towards the elevator to go down to the lunchroom. As the door opens (which you can hear audibly), he moves forward, then, while quickly dropping down to the ground lets out a fading yell as if he fell down the shaft... WELL ... this poor women let out a scream like you never heard before. Took a good hour to calm her down, my gut hurt from laughing while the whole time I felt so bad for her...