The next block down from the church there was a bank with this moving piece of metal, the two arcs moving up and down randomly. Here I offer a contrast in the two metal arcs' positions:

 

 

 

 

Notice the family between the two arcs. They discovered that the metal objects acted like bullhorns and were making elephant noises through them that we heard a block away. Of course Martin and I had to have a bit of fun with that, trying to yell through the horns when they aligned to see if we heard them on the other one.

 

 

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