One of the craziest experiences I ever had was when I was suddenly surrounded by a whirl-wind vortex. While I was wrapped up in it I heard a female's voice, one I assumed to be perhaps a teenager. All sorts of giggles, and short statements along with what you might call a kiss of the wind on the exposed skin. Lasted for just a few seconds, perhaps a minute at the most but was interesting while it happened. No physical form ever suggested, just the twister shape of the vortex and bits of dust and such picked up with it swirling around.
After that short time it moved away from me and I watched it skip across the ground before it simply vanished and the debrie fell to the ground.
This has happened to me too. I call them nature spirits out doing their thing.