Seagull calls have long been shorthand for the coast in film and games, but this short hihii version spread online as a reaction clip rather than a nature recording. Its laugh like rhythm made it easy to reuse outside any beach context, so editors began placing it over animals, people and animated characters as a mocking response. The six second length keeps it flexible for short form video, soundboards and group chats, where a single burst is enough to signal amusement without needing dialogue, music or an on screen explanation for the joke.