On our first trip home in the Tesla, we were driving to the supercharger in Beaver, Utah. About a quarter mile from the Interstate exit for the chargers, we saw a stalled Tesla and its driver walking toward the chargers. We spent about 20 minutes charging and passed the stalled Tesla as we continued on our way. The car was nearly loaded on the roll-back that would ferry it to the nearby supercharger, I guess. Total time spent was probably about the same as running out of gas, although the re-fueling process might take 15 or 20 minutes more than filling with gas. I thought that was pretty fast service but then on further reflection, it shouldn't come as a big surprise that there would be roll-backs close to a Supercharger.