This clip is mainly used online as a general disbelief reaction rather than for a widely recognized source reference. Short spoken lines like this spread through meme pages, reposts and reaction edits because they fit many situations without needing context. Creators keep using it for sudden reveals, awkward discoveries and ironic overreactions. Its staying power comes from how universal the phrase is: almost any visual punchline can be made funnier by adding a dramatic voice line, much like a bruh reaction or a buzzer sting.