one day i wake up, found the soybean market was falling apart, i quickly closed those contracts. result loss for the first three contracts.
then the following 3 long contracts were due to system error. i transacted three contrac without my order. 
then, i went long on wheat, but it turn out delcining, to stop loss, i closed them,
another three short soybean contracts, again, system error.
and this is pretty much the story.