EE WAS LIFTING 4' PIPE ONTO GETMAN UTILITY TRUCK. HE FELT SOMETHING ""POP"" BETWEEN HIS SHOULDER BLADES. HE WAS TREATED FOR MUSCLE STRAIN UNTIL FOLLOWUP APPT. ON 01-02-01. HE WAS PLACED ON RESTR ICTED DUTY UNTIL JAN. 16. THIS MAD THE INCIDENT REPORTABLE.