Both of my worst rolls were on "easy" hills that I didn't think I would need my shoulder straps on. The first one broke my wife's back, I will never live down the guilt of telling her that she wouldn't need her shoulder straps at the bottom of the hill. The second one I was alone and, while my back wasn't permanently damaged, it was definitely damaged short-term ad wasn't right for a year or so afterwards. I was sofa kingdom. Unless I'm on flat ground idling around I wear my shoulder straps now.
I'm very introspective. There are certain mistakes in my life, and just times that I acted dumb, that I constantly re-live in my head. I feel dumber and guiltier each and every time I re-hash them. Over time it only gets worse, not better. I'm told that not all people are like this, that it is a sign of extreme intelligence. (I don't know about that!) There are things as far back as freshman year in high school that I still can't allow myself to live down. But telling my wife that she wouldn't need shoulder straps is one of the top things that keep me awake at night even to this day.