The mystery object was filmed the other day in Sydney, Australia. It looks like a can of dark paint exploded high above the ground and then everything froze in midair.
The object is not completely still, you can see in the video that it seems to “flow” a little bit, but it doesn’t fall, it doesn’t rise and it doesn’t move sideways.
On social networks, many make jokes about the Dementor (a character from “Harry Potter”) or the alien “invading slime”.
More serious commentators believe that this is either video editing or a very unusual natural or man-made phenomenon.
There is a theory that this is some kind of rare storm cloud or the remnants of a small tornado.