the term 'disorganized' may be a bit general. You can have a very well-formed flame front that simply happens too quickly or doesn't allow for a controlled burn. (ie.. allowing air to mix in at a given rate).

The difference might be like lighting a balloon filled with gas versus spraying that same gas from a flame thrower in the same amount of time.

...one explodes with a resulting shockwave due to the speed of the flame front. The other expands the the surrounding air to the same degree, but softens the impact.

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