Knuckles has become a familiar face in online meme culture, where short vocal reactions are lifted, shared and reused far beyond their original context. A brief hum like this works because it needs no explanation, so creators on soundboards and in short videos keep returning to it for suspicious, curious or deadpan moments. Its one-and-a-half-second length also makes it easy to layer over edits without disrupting music or dialogue, which helps explain why such a small reaction continues to circulate.