amy johnson , from sydney , said she became aggressive because the fries had spilled out of their containers .
she said she put her hands in the bag , no gloves or nothing , picked up the chips and shoved them in the boxes and gave back the bag and that 's when she received her food from the 16-year-old girl at the drive-through hatch , the woman allegedly threw it back into the window and demanded a new order .
police say she grabbed the 16-year-old by the neck and scratched her face .