A friend of mine also died jan 4 this year, fell from 35ft did not have his harness attached to the tree while still climbing. It appears he was adjusting the cable and the bottom shifted. Had his 6yo son with him but back at the camp house. His wife and 12yo were in CO with other faimly. This happened in Walker Co, Alabama. He had been hunting for 20 years and was very well educated. Like you said it is going to happen sooner or later.