A one-legged woman wearing only black panties was discovered yesterday afternoon on the tracks of the N train in Besnonhurst. "I heard one of the workers screaming on the radio, 'A woman's body on the tracks!'" said Matt Bencivenga, a dispatcher for a car service company nearby. "She was all mangled." According to the News, her prosthetic leg was found nearby around 3:40 p.m., 100 feet from the Kings Highway station. Authorities think impact of the train knocked it off, and also severed her hand; investigators suspect the cause of the death may be a suicide.