Reported about 1 year ago
Recently in Berlin, Germany, mysterious black rings were spotted in the sky by citizens and captured on video, sparking discussions online. The video shared on Instagram showed several large black smoke rings floating in the Berlin sky without dissipating for a long time. Speculations ranged from alien sightings to government conspiracies, but one netizen pointed out that rock band Rammstein, known for fireworks, was rehearsing that day. Similar phenomena have been seen in the past and attributed to fireworks testing, such as at Warwick Castle in the UK in 2014.
Source: YAHOO