EE WAS BOLTING ROOF TOP IN #1 HEADING & HIS PUSHER BECAME FOULED IN THE DRILL CHUCK. HE PUT THE STEEL BACK TOGETHER & SWUNG THE POT TOWARD HIMSELF TO TRY TO BREAK IT LOOSE. THE COUPLING BETWEE N THE FINISHER & PUSHER BROKE IN TWO ALLOWING THE PUSHER TO SWING OVER & HIT HIM IN THE FACE.