The portable goat-mower makes the most sense. I think you're onto something there. Though a close second would be repetitive, dull-sound subliminal advertising leading to increased purchase within the store. There are studies concerning the clumpff clumpff of hooves on heavy sod, and the increased interest in produce purchase. Somehow triggers long-dead relationships between wandering a field looking for plants to eat, and cows following behind, because that is just what they do. Can't remember where I read about it though. Think it might have been in a magazine while waiting in line at the grocer's.