I don't even know how one would get to sitting on that thing let alone initiating movement. Your guess is as good as mine.
P.S. No, the low quality is not me adding fake grain through an inadequate grain filter run by some magical algorithm. he above image looks the way it does because it was a close up image shot with my Blackberry using the LCD screen of my computer as a makeshift light table. since the average aperture of most cell phone cameras comes out to roughly f/11 it caught the pixels produced by my screen behind my negative. I'll post a scan of the actual image later on this week.
Here's the scanned image: