This line comes from JoJo's Bizarre Adventure and is associated with the character Dio Brando. Online, fans often refer to it by the Japanese phrasing “Kono Dio Da” as well as the English “It was me, Dio.” The clip spread widely through anime meme culture, reaction videos and short edits because it delivers an instant villain reveal in barely a second. It is still popular for bait-and-switch punchlines, dramatic blame reveals and exaggerated anime-style confrontation jokes.