There is no widely documented source work behind this clip, and it circulates mainly as a short reaction sound rather than a quote tied to a specific show, film or creator. Its appeal comes from the phrase itself, a common Spanish way of asking what thing or what is that, made funnier by the drawn-out ending that turns a simple question into an exaggerated reaction. Short reaction clips like this travel easily between memes, edits and chat replies, which helps explain why a clip under a second long keeps appearing whenever something confusing needs a quick, recognisable response.
About this sound
A short Spanish voice clip saying qué cosa with a stretched, surprised ending, used as a funny reaction to confusing or unexpected moments in videos and memes.
This is a very short voice clip of someone asking qué cosa, with the final vowel stretched out into a long, bewildered aaa that makes the question sound more confused than curious. The delivery is casual and slightly exaggerated, almost like a double-take spoken out loud, and because it lasts less than a second it lands instantly without interrupting the scene around it. Viewers hear surprise, disbelief and a hint of playful mockery all at once, which is why it works so well as a punchline after something strange, random or hard to explain happens on screen.