He-Gassen

Ribald, strangely hilarious, and brilliantly Japanese. 

From io9...

Approximately 200-400 years ago during Japan's Edo period, an unknown artist created what is easily the most profound demonstration of human aesthetics ever committed to parchment. I am referring to He-Gassen a.k.a. 屁合戦 a.k.a. "the fart war." In this centuries-old scroll, women and men blow each other off the page with typhoon-like flatulence.  

Gassy competitions weren't limited to the scenes of He-Gassen (which is hilariously named in retrospect). Fart wars were also used to express displeasure at the encroaching European influence in Edo Japan — artists would depict Westerners being blown home on thunderous toots.

You can find the rest of the scroll, in its gaseous entirety, on Waseda University’s website.