Little is documented about the original source of the clip labelled Cx, and its listing gives no artist, title or source work to trace it back to. That anonymity is part of how it circulates online, shared on soundboards as a two letter curiosity that creators rediscover through recommendations and related meme sounds. Over time it has settled into gaming and reaction edits, where short named clips are collected, replayed and reused out of context, letting each new video give the same recording a slightly different meaning for its audience.