WHILE STANDING ON A LADDER APPRX. 6FT. UP, HE WAS ATTEMPTING TO CUT 4TH SIDE OF A BOX ON A SHUTE. WHILE MAKING 4TH CUT, THE BOX BROKE LOOSE BEFORE BEING COMPLETELY CUT IT THEN CAME BACK AND KI CKED THE LADDER OUT FROM UNDER HIM CAUSING HIM TO FALL TO THE GROUND AND LANDING ON HIS LEFT SIDE (WRIST & ARM) A LARGE KNOT APPEARED ON ARM .