I do believe it was a rookie situation. As a professional, we are still prone to make mistakes, usually ones that only we realize were even made. However, the occassional gutter may get bent or wire.might get torn down. BUT, to loose a tree altogether the wrong way without even being able to say that you did what you could to prevent that, is rookie. Every tree is a gamble. Every one. Somewhere in the mechanics of every tree, there's a way to fail. Think about it. It's true. But to lose a tree like that guy did tells me that he faiked to recognize the factors that favored failure.