I had left my Nikon camera in a shop, when I've realized and ran back, a shop associate was trying to knot it to a chair she just put outside of the shop (so it can be seen).
It was amazing!
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Other story I had in Japan. That I lost direction in Kyoto and had no money since all ATM is closed (at night).At some point somebody just stopped his bike and asked where i go. When I told him, he said that I should wait a bit, he will pick up his car and bring me there (in the middle of the night!) .. and so he did.
No place like japan (or at least very few)!