tagg.im / physics forumhttp://tagg.im/forum/physics2012-05-21T00:15:04ZDesert Sand + Helicopter Blades = Pixie Dust? (err, Sparks)http://tagg.im/thread/115/desert-sand-helicopter-blades-pixie-dust-err-sparksDolph2011-07-19T03:13:10ZSo, apparently when you combine a desert and high speed helicopter blades kicking up lots of sand into the air, you end up with a light show of sparks