An employee was driving a triple electric pallet jack, traveling northbound in the main drive aisle. A smaller electric pallet jack was traveling southbound on the opposite side of the drive aisle, which is separated by a pedestrian walking aisle. The employee turned toward the inbound side of the building prior to crossing the pedestrian walkway and entering the opposing drive aisle. The two pallet jacks collided. The employee was ejected from their pallet jack, fell to the floor, and her left leg was run over by the smaller pallet jack. The employee sustained crush injuries to the lower leg and foot that required amputation of the lower leg.