EMPLOYEE WAS STANDING UP ON FRONT SIDE OF AUTOMATIC PALLETIZER WHILE RESTACKING A PALLET THAT HAD JAMMED. HE WAS RESTACKING ONTO ANOTHER PALLET THAT WAS RAISED UP ON A FORKLIFT NEXT TO HIM. HE STARTED TO LOSE HIS BALANCE AND HOPPED DOWN TO THE FLOOR (APPROX 34""). HIS FOOT LANDED ON THE EDGE OF A BAG LAYING ON THE FLOOR, TWISTING HIS ANKLE SIDEWAYS.