The clip is credited to the online creator known as Xianjie Dashi, whose exasperated delivery turned the Mandarin phrase for who did it into a shareable meme. It circulates as a sub-second reaction audio for blame and mystery edits, fitting easily into short-form videos where timing is tight. Because the emotion is clear even without translation, Mandarin and non-Mandarin audiences both use it to punctuate reveals. Its brevity keeps it reusable across pranks, gaming fails and everyday accusation jokes.