The glaciers left Highland Township a country of kettles and hummocks, and the back roads still ride over them like a slow wave. Doc's Outdoor Maintenance Solutions mows that uneven ground — sloped side yards, hollows that hold water for a day after a storm, land that will not lie flat for anybody. Late in the day the light rakes across those rises and every crooked pass shows, which is exactly why the mowing lines are set to follow the roll of the land. Trimming, edging and yard cleanup finish what the mower begins. Grass on a hill can look every bit as good as grass on a flat, given the attention.