So, yesterday I had a full day of oak pruning. In the morning I heard another chainsaw in the area, which is not uncommon. But later in the day I was about 40 feet up when I hear someone start screaming bloody murder about a block away. I realized right away that it was coming from the same area I heard the chainsaw. I came out of the tree and jumped in the truck with my ground guy not knowing what to expect. Found the guy still screaming laying on the ground with a badly fractured leg just below the knee, bone was sticking out of his pants. Called 911 and tried to comfort him till the police got there, thankfully it didn't take long. He was working by himself off a ladder with no harness, rope, or PPE. Top cut a 6 inch limb that I assume swung down and knocked him off the ladder, which was barely held up by a twig right over top of him. Not really sure of his story but based on his pickup truck I think he might be a roofing contractor. Looking back on it I wish I would have asked some questions but didn't have much time before the cops got there. I was a little shaken up, mostly from the sound of his screams, I'm just glad I found him on the ground and not in the air.