EE WAS ATTEMPTING TO LIFT A TORQUE CONVERTER THAT WAS PARTIALLY BOLTED INTO A 992 LOADER. THE PICKING EYES BROKE CAUSING THE CRANE BLOCK TO JUMP SEVERAL FEET IN THE AIR AND ONE OF THE CABLES TO COME PARTIALLY OFF THE SHIV. HE DID NOT NOTICE THE FAULTY SITUATION & CON'T HIS JOB ABOUT 3' UNDER THE 200# BLOCK. THE BLOCK DROPPED ONTO HIS HARD HAT PINNING HIM AGAINST THE LOADER.