Listed under its Chinese title, Er Bian is a very short soundboard clip that has circulated mainly as a quick, reusable effect rather than as a line from a known film or show. Its sub-second length fits the fast rhythm of short-form video, where creators need an instant sound that does not slow down a cut. Because it is easy to drop into reaction videos, comedy edits and gaming highlights, it has stayed useful as a general-purpose impact sound, even without a widely documented origin or a famous character behind it.