EMPLOYEE WAS TRANSPORTING 2000# ""SUPER SACKS"" TO WAREHOUSE. WHILE PLACING SACK IN WAREHOUSE, EMPLOYEE RIPPED SACK IN BACK OF THE ONE HE WAS STACKING. EMPLOYEE TRIED TO QUICKLY REMOVE SACK THAT WAS ALREADY ON FORKLIFT FROM WAREHOUSE WHEN SACK STARTED TO LEAN & FALL OFF PALLET. AS EE DESCENDED RAMP IN REVERSE, FORKLIFT LEANED IN DIRECTION OF FALLING BAG & ROLLED OVER. STRUCK SHOULDER