What's your most amazing experience of generosity by a stranger?

Decades ago, an unknown woman came into the office where my then-fiancée worked, to book her flight home across the ocean. On learning we were about to be married and emigrate to her own home city, she immediately said "come to us"!

A few months later, she and her husband (who hadn't been consulted in the first place) were at the airport to meet us on arrival. We lived with them until we were 'on our feet' in two or three weeks. I'd never known such kindness from a stranger and will never forget it.