The exact origin of this Turkish phrase is not documented, so its life online comes from repetition rather than a known film or show. Short voice clips with oddly specific wording spread easily on soundboards because listeners can reuse them without context, and merdivende bir purna vardi fits that pattern perfectly. Its appeal is the mystery of the word purna and the serious way the sighting is announced. Shared as a quick meme audio, it now works as a standalone joke for stairs, hallways and random discoveries.