Several people in donut shaped inflatable rafts float down a narrow stream guided by people helping them in the water and watched by a small group of people on nearby land.   A group of people, float in a line, down a narrow stream of water in donut shaped, black inflatable rafts.   One woman gets stuck on a rock in the raft and shimmies herself loose.   The people reach the end of the narrow stream where a group of people help them off of the rafts and another small group of people watches them from nearby land.