I am infuriated with myself, as I almost lost my life yesterday. I was cutting some Elm that recently died from Dutch Elm Disease. 3 were quite close to each other. I cut one that was just moderately entangled with the other, and as it was falling, I followed it to the ground with my eyes. 1 second later, a 10" diameter branch nearly 12 feet long came down from the other tree from 20 feet in the air, and landed 3 feet from me. It would have killed me for sure had it hit me in the head. What a TERRIBLE mistake to make.