The line comes from a beloved French television commercial for Milka chocolate, in which a marmot is shown wrapping chocolate in aluminum foil while the narrator deadpans 'et la marmotte, elle met le chocolat dans le papier d'alu'. The absurd image made the ad a cult classic, and the phrase escaped into everyday French as an ironic reply to tall tales, much like 'yeah, right'. It spread through forums, reaction videos and memes, and French creators still drop the clip to puncture an exaggerated story with a wink.