Fire alarms have been standard in schools, offices, hospitals and public buildings for decades, using bells, horns and electronic sounders to warn people to evacuate during a fire or drill. Recordings and recreations of that distinctive tone later spread online through soundboards, video edits and prank clips. Creators treat it like a buzzer for instant emergency, pairing the sound with exaggerated reactions, empty hallways or characters running from harmless situations. Because almost everyone has heard a real alarm during a drill, the clip needs no context to be understood.