In message , Hot Badger 
Deluxe  writes

>Are you suggesting that such things should not be discussed? Take Crop
>Circles. They exist. What causes them is not known.

My wife and I once spent a fascinating few minutes on Blackdown's Temple 
of the Winds watching a mischievous dust devil and its two offspring 
wreak havoc on a field of barley. Dust devils on still evenings in late 
summer over the Weald can cause considerable trouble. Even a rabbit 
running across a field can set them off.

-- 
James Follett