The phrase people are thinking of with “who said that?” as a reaction GIF usually comes from reality TV, especially The Real Housewives of Atlanta clips featuring Porsha Williams or other cast members reacting in shock to something said off‑screen or at the table. However, there are also popular “who said that” GIFs from other contexts, like the drill instructor scene in Full Metal Jacket , where he yells “Who said that? Who the [expletive] said that?” at a recruit, which is another widely shared version. Because multiple shows and movies use that same phrase, there is no single definitive “who said that” GIF, so which one someone means depends on whether they are referencing reality TV reaction memes or classic movie scenes.