Transformer smoke ring
This image became pretty popular even outside of Reddit. The OP had first posted it on r/WhatIsThisThing, asking the community why a ring of smoke was floating in the air. Some shouted UFO activity while others took a more rational approach. Turns out, aliens had nothing to do with it, nor giant smokers.
These smoke rings are created by transformers, those cylindrical, metal “barrels” you can find hanging on electric posts. When they become unstable, bursts of smoke come shooting out of the top, which is what gives it its signature ring appearance. That sounds incredibly dangerous! Hopefully, the utility company was able to sort things out.