Saw these guys yesterday installing an invisible dog fence, almost wrecked my truck when I was driving by! See that concrete saw there? He was cutting the roots of that there tree with it, smoke rolling up out of the branches! He's chopping on the roots with the edging shovel trying to make it deeper now. Wish I could have got the pic while he was still using the saw, but I was laughing too much and didn't want him to see me