This looks like a plane flying in circles caused an interesting fallstreak pattern.
source:https://www.facebook.com/photo.php?fbid=1515883395331998&set=p.1515883395331998&type=1&permPage=1


source:https://www.facebook.com/photo.php?fbid=1515883395331998&set=p.1515883395331998&type=1&permPage=1
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