Climbing in and out are definitely the most dangerous times. Back when I was in high school I fell out of a climbing stand while getting into it only a few feet off the ground. It was a bit too high to start, but the base of the tree was really wide and I thought I could scramble into a chest high climber with no problem. I fell out and landed on my back on top of my bow. I broke the bow and knocked the wind out of me. I'm lucky I didn't get a broadhead in my back and into a lung. That was an eye opening experience for me as I have always worn a harness when in the stand, just now while climbing up and down. I usually get my stand pretty high (15-23 feet). Having spend some years doing quite a bit of rock climbing in my college days gives me a little more confidence, but I still worry about falling. I use a lineman' belt when hanging my stand, but admittedly, I usually don't when just climbing up or down. It just seems to take a really long time to get up or down and I actually feel more comfortable not using it after my climbing sticks are already hung.