It has a generally negative connotation, like someone who is filmed throwing a tantrum in public, or who posts a bunch of absolutely furious tweets in response to getting called out. Usually it’s considered an embarrassing and excessive reaction (possibly career-ending, or reputation besmirching). But sometimes you’ll see someone post a video/screenshot of a crash out with the title: “that was the most justified crash out ever,” implying that yes, their reaction was extreme, but for a good reason.