EE'S HAND SLIPPED WHILE OPENING A BOX OF FUSES AT THE ANFO TRAILER WITH A KNIFE. EE CUT EE'S RIGHT THUMB. EE INITIALLY WRAPPED IT IN A CLEAN RAG. EE ASKED ANOTHER EMPLOYEE TO CUT OFF PART OF THE EXCESS RAG. EE'S KNIFE SLIPPED AND CUT IE'S RIGHT THUMB A SECOND TIME.