The next sentence in the article is:

>Water boils at lower temperatures as pressure decreases.

So it wouldn't feel boiling-hot, just weird and bubbly?

Yes. Probably something like a carbonated beverage but without the acidity.

Anyone who's put liquid nitrogen in their mouth (and if you haven't, you've missed out) knows the feeling.

Please don't: http://www.telegraph.co.uk/health/9594000/Warning-over-liqui...

Yeah, you should obviously not actually ingest it.

The risk of shattered teeth stopped me from trying that one.

Like Pop Rocks, yes.

In high school chemistry class, we watched as water under a vacuum boiled and then turned to ice.

Yeah, any liquid water will boil in a vacuum, even if it's at body temperature or even colder (as long as it's not frozen of course).

The air was either way too thin to breathe, or quite hot (or both). Pretty uncomfortable no matter what.

Wouldn't the air have been cold?

Maybe not if a spaceship was exploding nearby?

Still terrifying.

Hard to imagine it would feel much different from a mouthful of Pop Rocks, really.

But pop rocks at 15km when you've just been blown out of a malfunctioning space vehicle still strapped to your chair while you're tryi to unbuckle it so you can pull the shute.

Just like pop rocks.

The context is an account of an incident in a NASA vacuum testing chamber where a tester's suit lost pressure, not of the crash.

I'm quite certain both experiences on the whole would be terrifying, but as the detail of the saliva boiling on the tongue was singled out to be terrifying on its own, that is what I based my comment on.

In my imagining of what it would feel like to have your saliva boil yet not be under a great amount of heat, I can only imagine it would feel like a mouth full of pop rocks. I don't find that terrifying.