Sewers overflow in nasty French laxative ad

This Ratatouille-esque print ad for Dulcolax laxative, by CBGrey in Paris, shows a bunch of cartoon rats with comical terrified expressions on their furry faces. They're charging up from the sewer into the street in a panic. For a second, I didn't get it. Then, I did. Well … ha. Look, if you need a laxative that's strong enough to overload a municipal sewer system, major dietary changes are in order. Most of us prefer gentle, overnight results from our laxatives.