I was in a park once, and there was a loose dog running around. A man scrambled down an embankment yelling after it, "Bella! BELLA!" while trying to chase it down. Everyone's head turned towards him just as he downshifted into the realization that it wasn't his dog and said: "THAAAT'Sss.... not my dog..." He shuffled away as confused as everyone else.
(I love this question and hopefully I'll remember more.)