EE WAS USING A COMALONG TO REPOSITION A RADIAL STACKER (CONVEYOR). HE SECURED BOTH ENDS OF THE COMEALONG TO WELDED EYES ON THE STACKER AND THE TRACK FRAM IT RUNS ALONG. WHEN HE TIGHTENED THE C OMEALONG, THE EYE ON THE TRAKC BROKE, FREEING THE END OF THE COMALONG AND CAUSING IT TO SPRING UP AND IT STRUCK THE EE IN THE BACK. EE DECLINED MEDICAL TREATMENT UNTIL 8-2-02 WHEN HE SOUGHT S