Take a look at a fire triangle. Oxygen, fuel source and heat, those three items and you got yourself a nice fire. Take one away and its out. If its worth it unlatch the hood slowley open it while some one else is using the extinguisher or water hose. The extinguisher is ment to remove one of the three items that create the fire. http://www.cqnet.com.au/~user/solley43/ ... riang.html