SML began as a long-running online puppet and plush comedy series built around Mario-inspired characters, with Junior, the spoiled kid version of Bowser, becoming one of its most recognisable voices. Short clips of Junior overreacting travel easily outside full episodes, and this scream became a standalone reaction sound shared on soundboards and in meme edits. Its appeal is that you do not need the original scene to understand it, the panic is clear in a few seconds, so creators reuse it whenever a character needs an outsized, childish meltdown.