Finally, the phrase Fallen Short, when capitalised and italicised sounds A Bit Rude.
I suspect it is like that as based on the thread it came from, Fallen Short was used to define the result of failing a charge, something which is currently not clearly defined in Necromunda. Defining it once then using it makes things much terser than having to say something like "unless the model fails to reach base to base contact" in every other sentence.
I am also an advocate of the 2/4/6 Flamer although I agree it probably does not need Volatile.