IIRC the components of "air duster" are heavier than air (they settle in the bottom of the lungs and are hard to exhale) while also a trigger of cardiac issues. I wouldn't want to inhale the uncombusted gas!
I was curious about your comment so I did a few searches, and it looks like a major decomposition product is hydrogen fluoride.
According to Wikipedia: "Hydrogen fluoride is a highly dangerous gas, forming corrosive and penetrating hydrofluoric acid upon contact with tissue. The gas can also cause blindness by rapid destruction of the corneas."
Only posting this because I've done that before :)
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