An NHP Trooper tased a man holding a 14 inch long knife Sunday. Steven Mumper had pulled up behind the trooper, who was completing a traffic stop. The Trooper approached Mumper as he was opening his trunk, and asked himwhat was going on, that's when Mumper pulled the knife out, and refused to drop it. At one point he was walking away, while hitting road signs with the knife. The trooper called for backup, then fired the taser hitting Mumper in the back. He was then subdued by other troopers. Mumper was hospitalized for evaluation.