EE LEFT DEEP MINE LOADING POINT IN 5TH GEAR, HE SHOULD HAVE BEEN IN 4TH. APPROX 150 FT FROM SCALE HOUSE HE TRIED TO SHIFT FROM 5TH TO 4TH, GOT THE TRUCK OUT OF GEAR, COULDN'T GET IT BACK IN GE AR SO HE DECIDED TO JUMP. NOTHING WAS WRONG PASTPRESHIFT BRAKE TEST. THE TRUCK IS AT HERITAGE EQUIPMENT FOR ESTIMATE & REPAIRS. ""OPERATOR MALFUNCTION""