Good one, Buck.
Looks pretty gnarly in that pic. No wonder he had a bit of errr, trouble there.
Those stone acoustic things reminded me of a display at the Toronto Science Center that I saw many moons ago. They had two, one at each end of a large display room with other items and lots of people milling around. You could whisper into one and the sound would bounce and be received by the other clear as a bell. All without electronics.
Give us this day our daily bacon.