We circled around the neighborhood for nearly an hour as he'd accelerate wildly at different speeds up or down hills and stopping or slowing at random times when he thought it was a good idea. This resulted in me running varied paces and stopping or dodging every few hundred feet. I had learned from Sunday's experience doing this to wear shorts and my running shoes instead of the clothes I had come home from work in! The sun was getting low in the sky so it was only about 88F with a low 60% humidity and I didn't sweat enough to blind myself. Given that I felt pretty recovered from Saturday's 5 mile run and didn't have another run scheduled until Wednesday it was a great filler that I hope to repeat under slightly more controlled circumstances--and without the beer.
* A Fartlek workout is not (normally) something as unsavory as the name may sound. It's where you vary your running speed and distance to vary the muscle fibers being used and get a good aerobic workout. If you do this after having a beer with dinner before beginning this workout, as I did not really plan on a workout, you might get to taste the beer twice, and perhaps regret that choice of beverage for the evening.