AS EMPLOYEES TRUCK WAS BEING LOADED BY THE 5130 EXCAVATOR. THE EXCAVATOR SLIPPED ON THE ICY BENCH AS THE OPERATOR WAS SWINGING A LOAD INTO THE TRUCK, CAUSING THE BUCKET OF THE EXCAVATOR TO STR IKE THE HEADACHE RACK OF THE TRUCK. AS A RESULT OF THE IMPACT EMPLOYEE COMPLAINED OF SORENESS IN HER NECK AND UPPER BACK.