IT'S A GAS!
'(<a href="http://www.j-archive.com/media/2007-10-02_DJ_09.jpg" target="_blank">Kelly of the Clue Crew performs an experiment.</a>) To make a simple fire extinguisher, just put some vinegar in baking soda and the chemical reaction produces <a href="http://www.j-archive.com/media/2007-10-02_DJ_09a.jpg" target="_blank">this gas</a>, which will put out a flame'
carbon dioxide