What do you regret doing to your body?

I can think of only one I'm willing to say I'm sure about. It's going to sound rather odd but most ppl in a variety of tradecraft do it without much forethought. Use of my limbs for a substitute clamp or marless vice, pounding surface like a soft anvil or support to drive out roll pins or pop plugs out of utility boxes etc, the butt of the fist as a mallet, teeth as a wire stripper, and my back and legs as a light duty chain hoist.

While occasional use of my body this way in my work was unavoidable and that is not the regret, the regret is that as often as not I did so in the interest of expediency. Now that I'm a well aged man and never truly have to do these things, I forget myself out of habit. That the bruising and healing time has gone from minutes or hours to days and weeks is good reason to never have, as I had, be so arrogant about making a habit of being able to take the pain to get my work done.

I'm getting tremendously better at remembering to be less in a rush but just made that mistake again a few days ago and just yesterday realized I'd heavily bruised myself again. And so now I'll be a gimp f for another few days. And that's annoying as all gitout. If ya get what I mean.