The term 'Runner from Down Under' refers to an EMU, a large flightless bird native to Australia. Emus are the second-largest living bird by height, and are known for their fast running speed, which can reach up to 31 mph. They are also the only bird with calf muscles, allowing them to take strides of up to 9 feet. Emus are an iconic symbol of Australia, and are featured on the Australian coat of arms.