Mysterious Black Ring Over Kazakh Village

A video of a mysterious dark ring in the sky over the village of Shortandy, Kazakhstan left people puzzled and prompted a wave of speculation. Some assumed that the smoky ring is the result of acetylene or a fireworks explosion. Others blamed the phenomenon on the work of a Vortex ring device.
In fact, this seems to be the result of an electrical transformer explosion. When electrical transformers explode, they produce some amazingly resilient smoke rings.