Amazing Clouds!

Driving from Fort William to Northumberland I couldn't believe my eyes when the clouds formed this amazing symmetrical shape!  
How can this be? 
So the camera came out and this was taken through the window doing about 65mph. Gotta love the VR Active  on this lens which never ceases to amaze me.

Extras  are The Kelpies also taken out of windscreen doing about 70mph and the little boat was taken on Loch Leven.-------------------------->

TTFN
Draco Dragon xx