Talking of car prangs, In heavy rain and completely overwhelmed with Mum Problems, I went back into another car as I was getting out of a parking space. I got out and was terribly apologetic, there was a small mark on the other car. My heart really sank, I just felt I didn't have the time or energy for dealing with an insurance claim or whatever.
An elderly chap got out of the other car and said 'Look, it doesn't look like serious damage, let's not worry about it, it's only a car and there are far more important things to worry about in the world'. Omg I could have hugged this man, I will never forget this small act of kindness in just letting it go. Here was someone in the world who understood what was not worth worrying about. To this day I appreciate that gesture so much, at a time when my world was really crumbling.
I hope one day I will treat someone else with that kindness if something similar happens to me.