EMPLOYEE STATED THAT HE WAS HELPING SET UP A 55 GAL DRUM OF ANTIFREEZE AT X-CUT ON CLEARANCE SIDE OF 3-NORTH SPUR SWITCH WHEN HE FELT SOMETHING PULL IN HIS LEFT ELBOW. (EMPLOYEE RETURNED TO WO RK 1-16-04 NEXT REGULAR SHIFT AND WORKED UNTIL 1-21-04, STARTED MISSING ON 1-22-04.)