The NYPD open up clip spread online as a standalone meme sound in the early 2020s, detached from any single confirmed TV show or film scene. It built popularity on TikTok, YouTube Shorts, and Discord soundboards because the combination of pounding knocks and the shouted police demand is instantly recognizable even without video. Creators reuse it as a universal signal for a fake raid or an overly serious entrance, and its short length makes it easy to layer over gameplay, pranks, and reaction edits without needing context.