Boom-Boom Clap. Boom-Boom Clap. We all know this famous beat, so get ready to start clapping! In this outrageously funny party game, must watch out for their unique hand symbol. An opponent makes your symbol, you must respond with your own symbol and then one of another player. It may sound easy, but wait until you're rockin' out with multiple symbols and laughing too hard to catch your opponents making yours!