The exact origin of this hua hua hua clip is unclear, but the repeated laugh became popular as a shareable reaction sound on soundboards and in short form video edits. Its appeal is its brevity, lasting about a second, so creators can drop it into a gap without covering dialogue. Similar short laughs like the baby laughing meme circulate the same way, passed between chats, meme pages and editors looking for a fast, recognisable giggle to signal that something is meant to be taken lightly rather than seriously.