I was mowing a customer's residence today as usual. This woman happens to be a HUGE PITA. She constantly tells me I am not mowing to the edge of her property, which I am. She has explained to me her propertly line at the beginning of the season and even put stakes out there the first few times so I would follow it to a tee and I follow it each time and even had a chat with the gentlemen who lives next door and he told me the exact same thing as she has, what the border is and all. Lately she has been complaining up a storm that I am not following the property line and her yard is a mess because of it, yada yada yada. The guy next door loathes this woman, a big pain in the ass. She calls the police on him because his truck is too loud, he has a big block and leaves for work at 5:30am and it distrubs her precious beauty sleep according to him. I have held my tounge because it is a valuable property to me, $45 a week. Today was the final straw. I am mowing with my headphones on when all of a sudden I am pelted in the back with a god damn walnut the size of a baseball almost. I friggin freak out and damn near broke my stearing levers in half. I hop off my mower and turn around to see this old ***** standing there yelling at me about this stinking damn property line and blaming me listening to my headphones as the culprit. I personally think this lady is about 6 bagels shy of a dozen. The neighbor saw this whole thing and was listening and came over and let this lady know that I am following the property line perfectly and that she is at fault and should be lucky no one was seriously hurt for throwing this walnut at me. I actually have a nice welt in the middle of my back from it still, 5 hours later. I went up to her, and cancelled service and told her in a stern voice that if she were a man, she would be on the bad end of a severe beating. Thank goodness the neighbor had the week off this week or I dont know what would have happened. I lost $45 a week but jesus, I dont think I have been that freaked out and being blindsided while mowing ever. My heart rate was probably 200 beats a minute right when it happened, shook me up for a few moments. I almost wished she was a dude because it would have been great to beat the living hell out of him right there on her property.