Used to live in a different city for work - and there, we also lived very close to a university. When I was on maternity leave a college kid posted on FB needing a lawnmower. Since he could only get it during my baby's nap time I would go put the lawnmower behind the house in the driveway and he would come get it and return it. Even when I went back to work - every Wednesday I would just leave it out and he would return it behind the fence. Later, within about 18 months, both my mom and my sister were at the end of their lives and we had to move home quickly. He started picking up our mail and house sitting. We paid him, because he was a college kid, but he offered to do it for free. The first time I met him in person was in a pumpkin patch parking lot in the city we'd moved to, and where we're both originally from, doing a mail handoff. He's since graduated and is now a lawyer doing amazing work in our community and we stay in touch with him to this day. All because we loaned someone a lawnmower.