EMPLOYEE STATED THAT HE WAS DROPPING RAILROAD CARS REQUIRING HIM TO TURN THE WHEEL SO AS TO TIGHTEN THE BRAKES TO STOP THE CARS. HE BEGAN FEELING PAIN IN HIS LOWER BACK WHICH CONTINUED THROUGH OUT THE DAY. BACK PAIN PERSISTED DURING THE WEEKAND HE MISSED WORK AND WENT TO THE DOCTOR ON 1-12-01. LOST TIME IS INCURRED.