# What reactions create a lot of gas really quickly?

I'm looking for a chemical reaction that produces a large amount of a gas in a very short amount of time (like less than a second). What are my options?

• I agree with Freddy. This reaction is the first that came to me, but your answer should contain more information (for starters, the complete reaction). I think that prior to this a similar reaction was used, but it generated $\ce{H2}$ which was a bit dangerous... – Molx May 2 '15 at 22:48