THIS INCIDENT WAS REPORTED TO THE MINE OPERATOR ON 11/25/03. WHILE OPENING A BOXCAR DOOR, THE DOOR GOT STUCK SO THE ASSOCITE PUSHED IT WITH HIS LEG. AS HE APPLIED PRESSURE TO THE DOOR, HE FELT A PAIN IN HIS LOWER LEFT ABDOMEN. LITTLE BY LITTLE THE PAIN IS GROWING. HE SOUGHT MEDICAL TREATMENT ON 11/25/03. HE WAS PLACED ON NO PUSH/PULL RESTRICTIONS UNTIL 12/16/03.