EE WAS BURNING METAL. AFTER CUTTING THROUGH THE PIECE, 1/2 OF IT SLIPPED FROM TABLE FALLING TO FLOOR. AS IT FELL IT PULLED THE HOSES OF THE WELDING TORCH CAUSING TORCH TO FALL. EE GRABBED AT T ORCH, BUMPING THE OXYGEN VALVE OPENING IT UP. THIS CAUSED AN INCREASED FLAME. THE NOZZLE OF THE TORCH WAS POINTED @ LT ARM CAUSING BURN. WENT TO ER, GIVEN MEDS & ANTIBIOTICS, RETURNED TO WORK