EE WAS CUTTING OUT A PIECE OF METAL ON THE SUMP ON THE FIRST FLOOR. AFTER CUTTING THE METAL, CORNER BECAME CAUGHT. WHILE ATTEMPTING TO KNOCK IT FREE WITH HIS FOOT, IT SUDDENLY FELL FREE CAUSIN G HIM TO LOSE HIS BALANCE. HE FELL CATCHING HIS LEFT ARM ON THE MESH LINING INT THE FRESHLY CUT METAL, CAUSING A SEVERE LACERATION. THE EE WAS WORKING AT A HEIGHT OF 5'6"" BUT WAS USING FALL.