You might have thought that Mel Brooks was just being patently satirical in Spaceballs, when the President (played by Brooks, natch), opens up a can of "PerriAir" to inhale the sweet smell of pure air on his polluted and dying planet.
Seems like some folks in India owe Mel a beer.
There was an article in a recent Nat'l Geographic about Mt. Fuji. In it, they have a picture of people using canned oxygen. No pic on the website, but the Field Notes of the photographer mention it:
http://magma.nationalgeographic.com/media/ngm/0208/feature3/assignment2.html
Under "Quirkiest".
I just noticed that URL was mentions "magma". That is one cool word. Magma.
Also, I just bought the Spaceballs DVD last week. It's on the $10 and under shelf. Where all the DVDs I buy are.