In Ahwatukee the mountain sits on the wrong side of the sky — South Mountain rises to the north, so the afternoon shade arrives from behind the houses instead of in front of them. Snappy Lawn Services runs the mowers through those foothill streets below Telegraph Pass, cutting, edging, trimming, and blowing the walks and driveway back down to bare concrete. Speed matters in a Phoenix summer; so do the last ten minutes, which are where a yard either finishes or merely stops. Grass here earns its keep — it is where kids land after school and where the evening cools off first. Getting a lawn right mostly means somebody else gets to use it.