Can anyone explain the theory behind the huge buy orders at...

Can anyone explain the theory behind the huge buy orders at extremely low values that seem to pop up late afternoon?

Assuming it's some attempt at manipulating the price through (at the surface) showing a massive disparity between the buy/sell sides?

Today for example, an 8 million unit order at $0.001/share has popped up to show a 10,000,000 buy side vs a 8,000,000 sell side when it's been anything but all day.