Oh no, it's a very
bad idea to inhale Canned Air. Canned Air (or, more technically, "
Compressed Gas Duster") is typically made of either
difluoroethane or
tetrafluoroethane—either of which is
Not Good For Your Health™ when
inhaled. It can do some simple
asphyxiation, could probably
poison you, and if you're not careful you could end up spilling some of the
compressed liquid out—freezing your
mouth and
lungs.
Avoid such actions.
A side note, I prefer tetrafluoroethane to difluoroethane, as its chemical stench is, for some reason, not nearly as strong.
200th node! Rock over London, Rock on Chicago!