@wil @coolandnormal @globalmuseum
They look like bones - whale ribs or something similar. The smallest is maybe a foot long, the longest about six feet.

I saw this performed at a show called "Vegas Nocturne" many years ago, in a restaurant called "Rose, Rabbit, Lie". Picture a restaurant with a small stage area set up in the middle of the seating, and a hundred patrons all holding their breaths, awestruck.