I have discovered a new method for mowing lawns. Admittedly, this technique works best with lawns that have tall grass, but with the correctly sized implements, it will work with lawns with shorter grass, too.
The technique involves attaching a long leash to a fast moving, well energized dog. Said leash would need to be coated properly, I'm thinking with small blades or shards of glass, ala fighter kite lines, which does the actual grass cutting.
With Annie attached to a leader leash, I have demonstrated the feasibility of the technique, if not the lack of safety of such a mowing.
For taller grass, a larger dog is sufficient. For shorter grass, however, a small, yippy dog is probably required for this technique to work properly. Preferably one that can be punted into work, if required.