I fell 3 feet when my seat broke with a safety belt around my waist, which is the wrong place to wear a safety belt in the first place.
It saved my life as I was 25 feet up, but it also broke a rib from a 3 foot fall and I was done hunting for that year.
The following week, I read where 2 other hunters fell in my area, one broke his back and the other man died.
After that I wore a body harness and used the climbing rope system.
Happens every year and we can preach tree stand safety till we are blue in the face, but there are those who still do not listen.
But we still need to try and convey the dangers of tree stand hunting.