ON 8/20/02 THE EE WAS DRILLING AND A CHUNK OF MATERIAL FELL FROM A HIGHWALL (40 FT) THE HIGHWALL WAS BENCHED 30 FT. THE EE SEEN THE MATERIAL FALLING AND CHOSE TO EXIT HIS MACHINE. THE MATERIAL HIT THE FAR SIDE OF THE DRILL AS THE EE WAS EXITING. THE EE FELL TO THE GROUND AND WAS NOT ABLE TO PROTECT HIMSELF. THE EE WORKED THE SHIFT AND RETURNED NEXT DAY.