This type of bonk sound does not point to one clear original source from the known details here. Online, bonk clips spread through short meme edits, prank videos and reaction posts because they are simple, readable and funny in almost any context. The sound is often used like an instagram thud or other quick impact effect, especially when a creator wants a softer, goofier punchline than a loud explosion. Its staying power comes from precise timing: one tiny hit can completely change the joke.