This sound comes from Storks, the 2016 animated comedy about a stork delivery company that has moved on from delivering babies to delivering packages. In the film, a large, antagonistic stork interrupts his rivals with an overly cheerful hello, and the contrast between his friendly tone and threatening entrance made the moment stand out. Fans later clipped the greeting for soundboards and short videos, where it works as an instant entrance cue. It endures because the hello is short, recognisable, and easy to drop into almost any reveal.