This Black Ring in the Sky freaked me out a bit, so I researched it

Seeing this black ring in the sky while driving, I immediately turned on my phone camera and pulled over. I left the video uncut until it dissipated, unlike other videos which only show a few seconds. On research I found they can be man-made by events such as the backfire of diesel engines and power transformer explosions. Though I believe there are sights in the sky not easily explained, I'm reasonably satisfied this is not one of them. If you have different thoughts you're welcome to leave them in the comment section. I welcome your opinion.