A couple of years ago I was running late getting in one morning and couldn't find a "good" tree for my climber in the area I wanted to hunt so I settled on a nice smooth bark and started up.
About 20 feet off the ground the top slipped while I was pulling up the bottom and I headbutted the tree. Luckily I was wearing my harness and didn't fall. I did black out while hugging the tree for a couple of minutes.
I spent the morning dabbing blood off of my face so that I could see but refused to give up and go home till noon......didn't see a single deer!
Mitch