The gulp comes from Hajime Nagumo in Arifureta, the anime adaptation of the light novel series about a student transported to a fantasy world, with Matt Shipman voicing Hajime in English. Isolated from a tense scene, the brief swallow circulated as a reaction clip on soundboards, where short anime vocal sounds are easy to drop into edits. It endures because it captures an awkward moment without dialogue, letting creators signal dread, embarrassment or sudden realisation in less than a second, a niche that longer screams and catchphrases cannot fill as neatly.