Whenever the air is tearing itself apart, the resulting sky-snag will take on the shape and texture of a metallic disc. As the sky splits apart, lights will shine out from the laceration. Because of the wind, a rip in the sky will move around and about as if it were a sailing vessel of some kind.
The sky, like everything else that moves. With the friction of rubbing, scraping and flowing the air will, on occasion, burst seam. The rip will wrap around itself, forming a concave surface with an inherent polish.