This sound comes from Howard Dean's 2004 U.S. presidential campaign, during a rally after the Iowa caucuses. Dean shouted a list of states and ended with the now-famous scream, which was widely replayed on television and online. The moment quickly became a political meme because the intense delivery sounded much more chaotic in short clips than it did in the full room context. It still gets used years later as shorthand for overexcited energy, public embarrassment, and momentum suddenly going off the rails.