Chasing Cars

It's something I've heard about more than I've actually seen. The other day I saw two stray dogs, a white one and a brown one, and they were out playing in the street together. They were actually chasing cars. I saw a car approach, and as it did their faces lit up. Then, as the car passed, I lost sight of them for a moment, but then they appeared behind the car, running at full speed, tongues wagging. The white dog gave up first, and skidded off to the side of the road, almost sliding into a ditch. The brown dog slowed down and then trotted over to the white dog and trounced playfully. Then another car approached and they were at it again.