CONTRACTOR WAS PULLING VACUUM HOSE TO INSERT INTO TOP OF RAIL CAR, FELT HIP/BACK POP. DR. PRESCRIBED PAIN KILLER AND ANTI-INFLAMATORY, ORDERED ONE WEEK OFF WORK THEN RETURN TO DR. FOR EVALUATI ON. HE IS DUE BACK TO WORK ON SEPT. 22ND. HE WILL BE ON LIGHT DUTY FOR APPROXIMATELY ONE WEEK.