Brave's New Siren: Stinky and Dirty try to fix Brave's broken siren, but the fire alarm sounds and they have to make other loud noises to clear traffic and escort Brave to an emergency call. Demolition Dust-Up: Dirty and the other construction trucks work together to build a road but their teamwork fails in a hilarious slapstick manner, until a shared music rhythm gets them all working in harmony.