When I was a kid, we used to live on a small side street that abutted a main throughfare, only a few doors from our home.
The main street had a smattering of three storey buildings, blocks of flats, commercial establishments, etc... that were all built of either brick or stone.
The neighbours across the street owned a dog that was kept outside most of the time, and - especially when things got quiet - it would bark incessantly. The reason for the animal's constant yapping was simply that; after it would bark, it would hear the echo of it's own bark off of one of the walls of the highly reflective buildings nearby, and then bark back at the echo.
It would bark at the echoes of it's own, annoying yelps until it got too hoarse to go on, or just simply fell asleep.
And it never learned any better.
Actually, I think the poor, lonely thing sort of enjoyed it.
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I wanted my half in the middle and I wound up on the edge.