I have only been knocked down once cutting hangers loose. It does leave a mark. Laying on the ground after the first two cuts went right and I thought the third one did too gives you time to think. Third cut into the large maple, it rolled the right direction caught in the croutch of another tree and stopped. I walk up to make the next cut, it then swung around and whacked me off my feet, croutch broke in the tree it hung in. Not expecting that to happen, there I laid with bruised ribs and ego thinking "it looked so easy". I got up after a few miniutes (it took that long to get my wind back) and went back to the garage and got the tractor and some chains to pull the maple the rest of the way down. It took the better part of a half hour to get the tractor, chains and get back to the tree. Part of that tree is a bench out there along the walking trail. The is a bench in Ohl, PA. just off the walking trail on the Kraus's farm to mark the spot of the one that almost took me out over 15 years ago. It has nothing to do with how much expeirience you have, treework is dangerous every day. I had clear escape routes and it still caught me off gaurd. If it takes a tree hitting you to wise you up to using mechanical means to take a hanger down lets hope you live to tell about it.