The sound comes from Dark Souls, where Mushroom Children are small, plant-like enemies found in the game's forest areas. When one is killed, it lets out this distinctive, childlike cry, a detail that players noticed and clipped from gameplay footage. The clip spread through Dark Souls videos, streams and meme edits, where its innocent tone clashed with the game's harsh combat. It remains popular because that contrast is instantly recognisable to fans and still lands for viewers who have never played the game.