EE WAS UNCOUPLING A CRILL STEEL CASING THE PIPE CLAMP WAS COMPLETELY SEALED ON THE CASING. WHEN THE COUPLING WAS UNSCREWED THE DRILL STEEL CASING DROPPED. THE PIPE WRENCH ATTACHED TO THE COUPL ING DROPPED WITH THE DRILL STEEL CASING & SMASHING THE EE'S LEFT/4TH FINGER BETWEEN THE DRILL TABLE & PIPE WRENCH