Many over the years actually.
Strangers who helped me (eg: when my car broke down...a few times)
Ones who were just spontaneously generous (a cab driver who shared his sandwich and refused to charge for the ride from Penn Station to way uptown in nyc, another cabbie who found and returned my mother who was lost and had dementia, also refused pay, a guy behind the counter in a convenience store who gave me ten bucks for gas when I was on empty and had no money on me (yes I paid him back)---more like this
I had my lost wallet returned, more than once, with all the money still in it.
(I seem to have this crazy luck with lost items, it used to drive my ex a bit nuts)
....and just remembering faces that were kind and gestures helpful...