SillyWabbit, your stories creep me out.
My turn, my turn!!!
My company's old office was a three-storey building that's quite old. The office has a stairway that leads from the lobby all the way to the third floor (so that's L, 1, 2, 3). Next to this stairway is a pathetic little lift that services only these three floors.
Okay, the story goes like this - I've this colleague who had to send some important document out via email to the client by the next day, and decided to go back to the office past 9pm to do this. By this time, everyone's gone home, so all lights in the floor where we worked, the third, were all out. In fact, the only place that's lighted is the stairway at the lobby level.
So anyway he gets up to 3rd floor, switches on the lights to only the portion of the office where we worked (the other portions of the office was still dark), and went to work. Now the place he sat faces the portion of the office that wasn't lighted. As he worked, he noticed something flashing past his peripheral vision (he was staring at a monitor working, remember); something in front of him. He glanced about, but the area in front of him was dark and he didn't see anything. This happened a couple of times in a short duration. He promptly shut down and got out of there.
I have another colleague who went back to the office at night (another night) for the same reason, sat in the lighted area, and seemed to notice the flashing thing in front of him also. He didn't stay for more than 5 minutes.
I myself once worked there till quite late one night, and upon leaving, switched off all lights and called for that pathetic elevator I mentioned before. The elevator door opened, the elevator lights flickered on, I got in, punched 'L', and closed the door.
And the elevator promptly opened up again. Still the same floor. I punched the Close door button, the door closed, and promptly opened again.
Now I've taken the elevator before and I know for a fact it behaves itself at other times. At this point I just got out and took the stairs down.
ds