You know how when you blow a shot at a coyote, and it goes into a full blown sprint?? They're body get's real low to the ground, they lean way into it, and their legs are a blurr?? That's how our Terrier runs. She only runs like this when she's chasing something living. For a ball she runs fast, but not like this.
We used to take her to the beach in Washington, and she would chase seagulls. Seagulls don't fly very fast, or gain altitude, she would chase them and they'd fly right above her about 3 feet in the air, and she would run down the beach jumping at them
My next dog is going to be a REAL hunting dog though!