It fascinates me how these tiny fibers will move and sway, even when in an environment with no air circulation. Sometimes you can even put a glass over something that has one of the fibers clinging to it, and it will still wiggle around, almost as if alive, almost as if swaying in the breeze - yet there's no breeze.
Last night, I watched as this cluster of fibers did an exotic bellydance, using my digital camera's display as a video microscope. There was no air moving in the room, and I held my breath, yet the fibers wriggled on, standing up on end and coiling around each other. It was a very creepy feeling, as the fibers gave the illusion of actual sentience in their movements.
I assume - but I really have no idea - that the motion of the fibers is caused by A) static electricity, B) uneven temperature in the air, and C) gravity/momentum as the fiber's own micro-weight shifts gently from where it's clinging. However, more paranoid minds than my own have tried to implicate tiny fibers into conspiracy theory.