Did a road trip in our teens from Melbourne to Sydney. On our way back we stopped at the petrol station at Pheasant's nest. We were nearly out of petrol, didn't have any money. My friend had some cigarettes, so we started awkwardly trying to sell a pack to people, just needed about $20 (back in those days petrol was a lot cheaper and obviously the dollar had better value). We approached a lady with her kids, told her our story of needing petrol to return home, and we had some cigarettes if she needed. She straight up gave us a $50 without asking anything in return.

This has been burned in my memory going on for more than 25 years. I have gone over and beyond for both people and strangers, but I have yet to be in a similar situation to pay it forward.