The phrase comes from everyday French slang for ticket inspectors on trains, buses and metros, and it circulates online as a short warning meme rather than a line from a named film or show. Creators reuse it whenever a video needs an instant sense of getting caught, from public transport jokes to wider skits about authority figures turning up at the worst moment. Its appeal is the shared recognition of that split-second panic, which keeps it useful for French-speaking audiences and for anyone who recognises the inspectors-versus-passengers joke from travel.