Mysterious black ring UFO in the sky above Anaheim CA USA 2015

CITY:
REGION:
COUNTRY:
DATE:

Anaheim
California
USA
May 20, 2015

Myself, my wife and many other people witnessed a large, mysterious black ring in the sky above Anaheim CA on 5/20/15. It resembled thick black smoke and seemed to be spinning. It hovered and drifted in the sky for approximately 2 minutes until it disintegrated. I happened to see people pointing and noticed it in what I think was the southeastern sky.Its shape and behavior don't match any known aircraft to me either. Definitely very strange!
Credit: MUFON
 

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