Deborah Stokol sent us photos and her eyewitness account of a BMW so moved by the wet surface of Manning Av. in Cheviot Hills that it took out the sign post. Only the Beemer was hurt:A woman lost control of her vehicle while driving on the rain slicked roads of Cheviot Hills Thursday 3:30 p.m. and plowed straight into a street sign, causing it to collapse in full onto her car, her husband Verapsong Chitaphony......