Cricket chirping has long been used in film and television to signal nighttime, emptiness and quiet, because listeners instantly associate the sound with still, outdoor nights. Online creators later borrowed that shorthand for short videos and memes, where a few chirps can stand in for an audience that did not laugh or a room that suddenly went silent. The clip here is only a couple of seconds long, which suits that quick punchline style, and its simple cri cri rhythm keeps it recognisable even at low volume or over other audio.