I was in Tokyo (Shibuya) meeting a friend and asked in Japanese a random kid (maybe 17) to help me find the Hachiko statue.  He got really excited, ditched his friends, and escorted me all the way there.  Similar story once when getting a train from Tokyo out to somewhere more remote -- the lady in the ticket booth said the train was coming soon, took me by the hand, and ran in her high heels to guide me to the proper track.<p>Whenever I spot tourists lost in my town I do these sorts of things for them, so that I can set their understanding of my entire city from just my one interaction.