Seen PLENTY of dust devils in my life, especially out on the Darling Downs and around Kingaroy. They get PLENTY strong!!!
Driving through SA on our way to WA, my wife and I not only watched a line of LARGE willi-willi's, but one "followed" our car (the change in pressure/bow wave cause by the car creates a "trail" for the vortex to follow). They appear as fast as they disappear.
Ghost? I'm afraid of no ghost.... GHOSTBUSTERS!
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