Why don't cigarettes explode?

Question

When you light a cigarette with a butane lighter, it of course does not always light on the first try. Your thumb holds the paddle down for a moment between tries, so some butane must be drawn into the tube of the cigarette. So why, when it finally lights, doesn't the cigarette explode?

Answer 1

Because only a minute amount of Butane comes out of the lighter.  It is concentrated at the point the flint strikes a spark and will ignite. If it is not ignited there is enough "air" (the random gasses making up air anyway) that the gas drawn into the cigarette is only a little bit of the butane.  It isn't even enough to make the tobacco burn faster, much less explode under normal conditions.