you guys are overestimating liquid nitrogen… you can definately handle it in containers without gloves. granted, if you submerge your hands in it, it will give you severe frostbite, but mild exposure from a splash or something, will do no less then cause irritation or a slight burn. you can actually ingest liquid nitrogen. ive ate liquid nitrogen ice cream before, you can find a ton of recipes on the internet if your interested. take it from someone whose studying chemistry, its been on me before. its not that bad.
actually, liquid nitrogen vaporizes immediately on contact with anything warmer than itself… hence the constant vapor. so once you open the container its stored in, anything over about -150 degrees celsius will cause it to boil off… the exposure just wouldnt be enough to do any significant damage… unless your a dumbass and just submerge yourself in the container.
EDIT: haha, i was curious… it is actually used as a coolant for super computers. pretty crazy