There is no single famous scene behind this clip, which is part of why it travels so easily as a generic meme sound. A whispered psst is a universal way to say pay attention or come here without speaking aloud, so creators reuse the same half-second cue across skits, reaction edits, gaming clips, and short-form videos. Its brevity makes it easy to drop into a transition or hide under dialogue, and because listeners recognise the gesture instantly, it needs no setup. That instant recognition keeps it useful long after any one trend fades.