EE WAS DIGGING OUT A TRENCH WITH THE EXCAVATOR. HE WAS MOVING THE EXCAVATOR BACKWARDS WITH THE TURNTABLE TO HIS LEFT, WHICH WAS THE WRONG POSITION. THE WEIGHT OF THE EXCAVATOR CAUSED THE TRACKS TO FALL INTO THE TRENCH ON ITS SIDE. EE IS HAVING BACK PAIN. (EXCAVATOR ENDED UP ON ITS SIDE; EE WAS NOT EJECTED FROM CAB - WAS WEARING SEAT BELT.)