EMPLOYEE DROPPED A 5-GALLON BUCKET CONTAINING SAMPLE DISCARDS THAT WEIGHED ABOUT 50 POUNDS. HE TRIED TO CATCH THE BUCKET BEFORE IT HIT THE FLOOR AND IN DOING SO STRAINED HIS LOWER BACK. LATER IN THE DAY HE REQUESTED MEDICAL EXAMINATION. TREATING PHYSICIAN DIAGNOSED A LUMBAR STRAIN AND PRESCRIBED MEDS AND PHYS THERAPY.