An explosion at a Pennsylvania chocolate factory killed seven people, and the only survivor of the disaster claims that she plunged through the floor into a vat of liquid chocolate. The black liquid doused the flames on Patricia Borges’ arm, but not before she broke her collarbone and both heels. As firemen fought the blaze and helicopters pounded above the RM Palmer Co. plant, she would spend the next nine hours screaming for aid and waiting for rescue.