EMPLOYEE WAS CHANGING OXYGEN & ACETELYNE BOTTLES WHEN HE PUSHED HIS RIGHT MIDDLE FINGERNAIL UP. HE HAD HIS RIGHT HAND AROUND THE BOTTLE SLIDING IT ON THE TRUCK WHEN HIS FINGER CAME INTO CONTACT WITH A PIECE OF METAL AT THE BACK OF THE BOTTLE RACK. STITCHES WERE USED MAKING THIS A REPORTABLE MEDICAL.