Quote from illiquid:
Tape painting occurs all the time in the less liquid names -- it's the only logical explanation for some of the price action that you see.
Btw, how much easier would trading be if you could hit your own bids or offers to induce panic, then push the market in the opposite direction of whichever side got hit by some trader who got suckered in. Seems routine, and I'm sure there are funds set up to do precisely that in a manner which is difficult to trace.
that's exactly what i was going to post