Baba Booey began as a catchphrase shouted by callers to The Howard Stern Show, where it became a long-running in-joke linked to producer Gary Dell'Abate. Alastor, by contrast, is the radio demon from Hazbin Hotel, an animated series known for its theatrical characters and old-time broadcast style. Bringing the two together makes the clip work as a crossover joke, pairing a classic radio prank phrase with a character built around radio itself. That contrast is why it keeps appearing in fan edits and short meme videos.