A slight detour on smoke rings...
This IOD brought up a vivid memory I have of a billboard that blew smokerings.
The strange thing for me is that my memory is of me
as a very little kid walking hand-in-hand with my parents,
and being dragged along because I was fascinated by the smoke rings coming from this sign.
Since I grew up in L.A., I searched Google images and am somewhat
dismayed that the only image of such a billboard was from NY City !
Now, I do remember we once made a trip to NY to visit relatives,
but I would have sworn that Camel's sign was in Los Angeles.
Here is a day-light pic, but the smoke rings are not as well shown.
Memory is a lousy fact-finder.
Now, returning you to today's IOD and Mt Etna...