At the centerpiece of the world famous Rio Carnaval is the Samba Parade - a fierce competition of vast scale among 13 neighborhood samba schools. Watching them are a panel of expert judges, more than 60,000 spectators and a TV audience of nearly half a billion. The unexpected is always expected during one of the largest parties on earth, and INSIDE is right there to find out how Rio survives and Carnaval continues to thrive.