Since that happened to me, I always tie the top and bottom together with a short rope once I’m up. Fortunately for me, it happened when I was in my early twenties and in excellent shape. I was able to bear hug the tree and shimmy down. Then same way going back up, hug the tree, lift my feet and repeat until I reached the other half of the stand. I don’t know if I could do that these days, and I have no desire to try.