This morning when i get up and open the computer as usual ,OMG I just find all of my site's SERP dropping, they all drop from the first page to 5- 8 page . I don't know what happened ,if its Google dancing why all of them dancing at the same time , its this some kind of panda update? or i just loss all of my sites? somebody can help me please , i am so sad now . i can't even eat my breakfast .