The sound comes from Super Mario Bros. 3, the Nintendo platform game starring Mario, in which losing a life triggers this short descending tune as he falls from the screen. It travelled far beyond the original game through gameplay videos, edits and memes, where viewers recognised it even without seeing the game itself. Alongside other iconic game death sounds such as Roblox oof, it is now shorthand online for failure, and it stays popular because it is brief, instantly familiar and funny rather than harsh.