I remember seeing one of these in a book when I was kid; over a series of six or so pictures the entire thing eventually filled in with a cloud. The book was trying to push it as a UFO and to be fair it was rather otherworldly. I have no idea how much was know about these events at the time.
"It is the mark of an educated mind to be able to entertain a thought without accepting it." Aristotle
Posted 14 April 2014 - 06:55 PM
Here's a couple of possibilities as well...
From the youtube OP comments
"While having a drink outdoors at Pint on Milwaukee, we looked up to see a ton of smoke that looked like a small mushroom cloud, that quickly turned into this incredible perfect circle of smoke. Nobody had a clue what it was, but while walking down the street later we learned an electrical transformer had exploded, catching fire and sending this amazing explosive cloud into the air. The transformer itself fell onto a truck, crushing its toolbox and setting the truck on fire. Awesome!"
Or then there is this...
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"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." Thomas Jefferson
Hey, I'm not wrong. I'm just not completely right.
Posted 14 April 2014 - 06:59 PM
It does look like a votex ring. I'd never heard of that phenomena before.
It does not appear to be going up very fast, so it probably was not explosives involved. Also the girl probably would have heard the explosion. Maybe a very hot, but small fire, that made some initial black smoke, but very little after getting started?
Here at Intel we make processors on 12 inch wafers. And, the individual processors on the wafers are called die. And, I am employed to check these die. That is why I am the DieChecker.
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