EE WAS OPERATING A CAT 651 SCRAPER, WHEN HE ALLEGES THE REAR OF THE SCAPER STARTED SLIDING SIDEWAYS DOWN THE SLOPE HE WAS WORKING ON. THE TOP OF THE SLOPE OF THE PIT AREA WAS ICY CAUSING THE S CRAPER TO SLIDE UNTI IT HIT A SOFT SPOT IN THE SLOPE CAUSING THE SCRAPER TO ROLL LAND 1/2 TIMES.