LOL... this is how I tend to exercise the dogs when I'm over at my dads house. The lazy way (on my part). I ride the four wheeler by the fence and they go nuts chasing me.
This was after like 20 mins of straight running so they were already super tired at this point. But still going strong! Fast little pups. Jackson usually hits about 20mph at his fastest.
FYI, Jackson's been doing this for years and has no motion reactivity - he doesn't chase cars or four wheelers when he's on the outside of the fence. Wouldn't encourage this with a car-chasing dog.