The reason for the 12,000 fall was partly due to initial unemployment claims from the previous week being revised upwards to 389,0000 persons; and, the four week running average was also revised up wards to 377,750. U.S.A. D.O.L. press release
Bear in mind though, this static has virtually no reflection of the true state of the employment/unemployment situation in the U.S.A. It does, however, give the media something to bleat about. So enjoy the roller-coaster ride, but you had better get off before the next river crossing. Because the bridge has been washed away.