One time I was in Spain and I found 5 Australian dollars on the floor in a train station. I picked it up and pocketed it. The same day, I climbed a bell tower in some museum/remains and was chilling up there for half an hour, without anybody else coming up. Eventually another person came up and said hi. Recognised they were Australian so I asked them if they wanted 5 dollars and they said "....yeah?" And I gave it to them. No explanation.

I laugh sometimes thinking of the story from their perspective, climbing a Spanish bell tower and meeting an English guy at the top who hands them 5AUD, like a NPC in an RPG.