Remember Gandalf’s smoke rings?

[Innisfree]

Mount Etna’s producing giant versions.

Quote

Mount Etna, Europe’s largest active volcano, puffed out a string of near-perfect rings over the weekend — prompting comparisons to smoke rings, or a fleet of giant flying saucers floating gently into the blue sky.

https://wapo.st/4avbHXx (gifted)

[EKS]

That's amazing!

We used to do that with air while scuba diving.

[Ausmumof3]

One of the science shows here had a kind of giant smoke ring machine they made up. It was pretty cool. 

[dsmith]

Wow, that's pretty cool!