Here's a good one;
Nine years ago, medical science ravaged me. High-dose experimental chemo, total body radiation (X6), pokes, cuts, probes, removals, etc. etc.
I was a ninety yr old when I left that hospital. Five years later, just as I was getting back into the trees, a blind (legally) driver pulled his pick-up out onto the highway directly in my 70-mph path, I had no options other than aim for his bed - - boom. Again, medical science had me captive. Poke, probe, replace, and removals all over again. Should've worn my seatbelt, maybe it wouldn't have hurt so much.
Today, if I don't climb, I'll fold-up and wither away. All my bones are dissolving, have to have something to keep me rigid - and that's muscle. Keep fit, drink beer if necessary, but don't go over four days without something to climb, even if for free. Trust me, I'm up there with Tom in years.
Dad's 92, I had to tell my mom when she called all freaked-out that he's okay up there - up 60 feet in a pine behind their house with a swede saw in one hand, a limb in the other.