The D'Onofrio horn is best known as the signature sound of D'Onofrio ice cream vendors in Peru. Rather than coming from a movie or viral character quote, it spread through everyday public familiarity and later through social media clips, parody edits, and nostalgic posts. People recognize it immediately because it was part of ordinary neighborhood life for years, especially when ice cream carts or trucks passed by. That real-world recognition is why the clip still gets used online as a fast cue for nostalgia, street commerce, and childhood excitement.