I just thought about sharing this story with you in here. It happened to me when I was travelling the Asian countires.
I was in a overnight travel in a big boat, and as a poor student, I shared my room with three girls. They were all students who studied at the previous country, and going home for a summer vacation. We hit off very well, and had very nice conversations about our countries and funny stories. I can still recall the strong sea wind on my cheeks on the deck as we talked.
After a night of trip, we are about to make a land. We said goodbye, promising to keep in touch. After walking out from the passport controll building alone, I suddenly noticed the shocking truth: the day was Sunday, which means every currency change (mainly banks) was closed. I planned to go to my Youth Hostel by subway, but they don't accept my credit card. Worse, the taxi in the country doesn't accept the credit card.
I was at a loss, cursing my foolishness in my head. Then I noticed that one of the girl I shared the room was standing there, with her husband. She noticed me too, asked me what's wrong. I asked them if they knew some place to exchange money in the city. They said yes, but didn't recommend it because of the ultra-bad exchange rate they have, and the place was too far from there. Next moment, he pulled out his wallet and handed me a few bills, saying I could survive by this until the next day. I hesitated, but said many thanks and exchanged the money with him (we knew the rate, it's almost always the same exchange rate). She told me not to worry about bothering them about exchanges, since she could use my money next time she went back to there.
And then, he picked out some coins from his wallet and gave it to me! Before I opened my mouth, he said "Buy a metro ticket - the machine does not accept paper bills". When I opened my purse to pick up my coins, they stopped me, saying they didn't take ticket money from me. I insisted, but they talked me out of it. They also directed me to the right metro station.
When I got teary and said how nice they were, they just smiled and he said: "I was once in your country, and a lot of people helped me when I was travelling". I don't know how to say enough thank you to both of them, AND someone who helped them in my country. I always do my best to help travellers from then.