EE STATED THAT HE WAS THROWING EMPTY BARRELS INTO THE TRUCK BED OF THE PARTS TRUCK. WHEN THROWING 2ND BARREL INTO TRUCK. HE STRUCK HIS LEFT ELBOW AGAINST THE CORNER OF THE TRUCK BED. ELBOW BEG AN SWELLING DUE TO SOME INTERNAL BLEEDING IN LEFT . WENT TO DR - NO LOST TIME BUT RESTRICTED WORK ACTIVITY.