i am just do not think the OPs is one of them. he had a chance to make a nice profit but he made the position public
and there are people here on this forum who have enough cash to buy a lot of btc to have messed with him.
Bitcoinica doesn't hedge 100% possitions. This action is loss. You cant predict how much bitcoinica will hedge, if you are not bitcoinica/ friends/stuff
Someone had enough money to move all of mtgox by $2 within a short time window around that period. You can't predict how much bitcoinica hedges, but if you move the mtgox price by $2 (up and down), you can be pretty sure a lot of leveraged positions (in both directions) are going to get fucked hard.