The sound comes from Vice President Kamala Harris speaking in 2021 during remarks related to migration from Central America, where the line “do not come” was widely quoted. Short clips of that moment spread across social platforms and were repurposed as a reaction sound in memes, political edits, and ironic skits. It remains popular because the delivery is concise, unmistakable, and easy to drop into videos whenever a creator wants a serious-sounding warning that doubles as a punchline.