Place it at the turning point where a calm setup collapses into chaos, after a quiet sigh and before a loud crash or a record scratch, so the reaction that follows lands harder.
关于此声音
This 1.3-second clip is Frank Costanza shouting 'Serenity now' in a voice that starts out strained and calm before snapping into open frustration. It feels funny because the words promise peace while the delivery sounds like a meltdown in progress. The line comes from Seinfeld, where Frank uses it as a relaxation mantra that fails every time he says it.