What is the nicest thing a stranger has done for you?
It's always nice to hear about people doing something nice for someone they don't know!
For me it would have to be the person (I'll never know who) who turned in my lost wallet with EVERYTHING still in there. I never expected the cash to still be in there, but it was!
So what is the nicest thing a stranger has done for you? It doesn't count if they work there :)