Foliage-Covered Fence

Yesterday afternoon, I was walking through downtown, when I noticed a big rubber ball in the gutter. Just then, on the other side of a foliage-covered fence, I heard a woman say "Look, the ball rolled into the street!" I couldn't see anyone: just a sign indicating a school was located nearby, and the blank face of the foliage-covered fence. Concluding that this was the woman's ball, I retrieved the ball and tossed it back over the fence.

Not only did I hear the woman say "thank you", I heard a whole chorus of little voices saying "thank you" from behind the expressionless, foliage-covered fence.