Things that make you go hmm... huge amount of volume no doubt.
A couple of items of note with this stock.
If it falls below a penny...it wont be traded by many of brokerage houses. If only 1 account sold all those shares then they got some severe liquidity issues occuring. The most any brokerage house can sell on this position is 30% past the 20 day average.
We could see a forced buy in situation occur, in which place this could cause a short squeeze. I guess we will see on Monday or Tuesday.