Rock Steady?

Rock of Ages, String of Pearls, Blowin' in the Wind? Why would you wire some stones together and dangle them from a tree so pedestrians would pass directly beneath them? I glanced up, flinched, and moved aside.
Picked up sandwiches and sat on a cold bench at Peninsula Park to eat them with a friend. The roses are putting on a lot of growth, some theater-types were rehearsing, wearing heavy capes that looked like colorful sleeping bags, but it was windy and cold making for a short outing. Back home, the sun came out making an evening walk pretty nice.