If you want to boost this with a second controller/ split screen and 2nd gold account set up a private king of the hill with no bots on security with default weapons. Or two discs with a friend private match no bots. Meet in the middle with your dummy and both people equiped with lancers. Get close facing each other and press B on both controllers once. Once you see it telling you to tap B, tap B on the controller you want to win the chainsaw duel then rinse and repeat.