...for sewer-rattling bowel movements.

(click ad) Ha—how hilariously disgusting! Take Dulcolax laxative, and your subsequent defecation will scare the shit out of the subterranean rats. Nice artwork. Ad via Paris agency Callegari Berville Grey. French toilet humour! (via). Previously in bowel movement advertising:
Foghorn Leghorn sez: get screened for colon cancer. This is your asshole without Kellogg's All-Bran. Finland vs. the USA—Colon Ad War. Hemorrhoid cream is like slathering a glacier/waterfall into your burning starfish. And my brilliant beano jingle.