(Photo courtesy of SJ Cho, PhD)
They cruised like airplanes. They had big, heavy heads for directional control; like a spear-head. They also had small arms for steering at fast speed. Their toes were for ground traction, and their gastralia bones were for ventilation/hepatic pump. They rammed into prey. Because of the balance matter of dinosaurs, once a prey falls to the ground, they can bite to finish.