talk about retarded...on the very first line of the article in that link..."Brain injury and suffocation can result from lack of oxygen. When used as an anesthetic, nitrous is always administered in combination with oxygen. Never use nitrous in any manner that does not provide for adequate oxygen intake"

sheesh, you guys worry me. many stupid kids have died from this stuff by going into a closet with a tank and losing consciousness then soon suffocates! others have permanent lung damage from the cartridges and their throats and lungs suffer frostbite...and there are many other ways you can hurt or kill yourself with this stuff.

and "you can suffocate from smoking weed too" is just too ridiculus of a statement to even bother with...