Seen here indicating that, yes, the One Ring was successfully destroyed,
Mount Doom in Mordor Mount Etna in Italy blows some celebratory bubbles smoke rings. It is only the third documented case of volcanic smoke rings and is clearly an attempt to communicate with humans. *studying smoke signals* "Well?" I think it wants us to sacrifice a virgin. "You sure?" No, it might just want us to feed it old tires.
Hit the jump for the rings in action.
Thanks to Frank, who tried skipping a rock in a volcano once with disappointing results. It ate your rock, didn't it?