When observing one in the midst of a fart battle they can often be found making funny faces, and are generally enveloped in extreme focus. These battles are extremely dangerous, as the fart could at any moment explode and overwhelm the victim or those those around him/her.
guy 2- i know what u mean, I have fart battles all the time
Oh, we're having a fart battle, recording our farts to be put up on FartBattle(dot)com for judging. We must settle this score!