Get a periodic table, nitrogen is a noble gas that is not flammable. It takes a great deal of energy to react with anything, but it has been done in a lab setting before. In normal everyday life, there is no way in hell you will get nitrogen to react. However, you were partially correct on the nitrous oxide.Nitrogen = flammable
On to nitrous oxide:
Q: Is nitrous oxide flammable?
A: No. Nitrous oxide by itself is non-flammable. However, the oxygen present in nitrous oxide causes combustion of fuel to take place more rapidly. (http://www.nightrider.com/biketech/nos01.htm)
FALLACY: N2O is explosive and a fire hazard.
FACT: N2O will not burn, nor is it a fuel. It is merely an oxygen-rich compound that supports the combustion of additional fuel. That's why additional fuel is injected along with the N2O on all N2O systems. It is true that if N2O is added to a combustion process already in progress, the extra oxygen may cause rapid, uncontrolled combustion, thus raising the peak temperatures produced. (http://www.dynopower.freeserve.co.uk/nitrous_oxide/faq_technical.htm)
However, the best article I have found on the subject is this one if you don't mind reading: http://www.idavette.net/hib/nitrous.htm
