The prettiest fart ad ever created.
(click ad, via) It's for Eno brand antacid, via Ogilvy & Mather India. It was part of a campaign that also featured bubble fish and chicken executions. Probably a scam campaign, considering that the logo is almost fucking hidden. But the respect for the black space pleases me. Almost as much as a good fart. Eno, by the way, also produced the most macabre antacid print ads I've ever seen.
ADDN: Here's a comprehensive copyranter post of FartVertising.