EMPLOYEE WAS IN THE PROCESS OF WALKING IN AN AREA IN PREPARATION TO BE SEEDED. AS HE WAS BACKING HIS DOZER UP, HE BACKED INTO A DITCH, CAUSING A QUICK JERK TO HIS BACK. THE PRELIMINARY REPORT IS A MUSCLE SPRAIN, AND HE HAS BEEN PLACED ON THERAPY. HE CONTINUED TO WORK HIS REGULAR SHIFT,THROUGH 11-8-00. THE FIRST DAY OFF WORK WAS 11-9-00.