EE WAS EXAMINING A 2'X 2""X 1/4"" PIECE OF ANGLE STEEL. AS EE TURNED IT OVER THE RACK WAS JARRED AND A PIECE OF 2""X 2""X 1/4"" PIECE OF SQUARE TUBING FELL FROM THE TOP RACK AND STRUCK EE ON RIGHT HAND AND THUMB GOT CAUGHT BETWEEN AND RECEIVED LACERATION TO RT. THUMB REQUIRING SUTURES.