Originally published at:			Massive flash and boom recorded over Minnesota remains a mystery (video) | Boing Boing
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          Was it a gender reveal party?
              
              
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          How about we put this on a flag?
              
              
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          Judging by the elapsed time from flash to boom, it couldn’t be much more than half a mile away. My money’s on fireworks or some other explosive. We get our windows rattled here on the 4th of July, by the concussion-type ones (which I believe are illegal, but there they are). Our little PD’s flash-bang devices will rattle windows too.
              
              
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          For the scientist who made the “I’d rather get 1,000 meteor wrongs to get 1 meteorite” joke:

              
              
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