Flashbending

It's not Combustionbending but it's the next best thing.

Flashbending, is a specialized Bending technique of Firebending that involves the instant creation of very bright and shortlived flames, creating an harmless but distracting "explosion", it is an adjacent technique to combustion bending but which lacks power altogether.

Overview
Flashbending is a technique discovered by attempts at replicating lightning and combustion bending by common firebenders who did not know the secrets behind these, instead in their experimentation they managed to create small explosions that would blow up in their faces that would do essentially no damage but would push them back, produce a loud bang and create a bright flash of light, the first steps to mastering Flashbending had been taken.

It took a few years for the technique to be properly refined but in the streets of the outermost edges of the firenation this technique flourished in the hands of troublesome youths who'd use it to play pranks and to get out of trouble. While flashbending has no obvious damaging application it is a versatile "trick" to have that can be used in many ways to create essentially flashbangs.

Techniques
The most basic combat technique for flashbending is to use it right before another technique to momentarily blind and deafen your opponent to guarantee another more powerful technique lands. More advanced users of Flashbending might use it simultaneously with an attack to guarantee its success since the person won't even realize an attack is happening, while masters of Flashbending may even be able to use it without generating either sound or light, or to keep up the light for longer than a mere instant to not let the opponent even see.

Users

 * Senko (Master)
 * Sennyu (Master)
 * Iai (Advanced)

Trivia

 * Every Earthbender has the potential to learn or reverse engineer this sub bending skill, it is simply kept in the family.