Place it at the end of a short setup, just before the visual payoff, then follow it with goofy ahh sounds for a stranger second beat or with the Bruh sound when the joke needs a flat reaction instead.
关于此声音
Seikin delivers a single bright “waho” in this clip, which runs for about a second and ends almost as soon as it begins. It lands as goofy and a little startling, giving a scene a quick jolt of playful randomness. It is known as a Seikin meme vocal, shared in Japanese meme edits, reaction videos and absurd punchline moments.