and that's the most frightening part is, we know she's getting tired. we've seen her swimming. she's tried to swim away from this raft a number of times and she just gets sucked right back to it. >> let go of the boat! >> john lane screams to her to let go of the boat. they need her to go downstream if there's going to be any chance of saving her. finally naomi lets go of the boat. then she disappears into the white froth. >> and i just wait and i watched. and nothing came up. and then about 40 feet past me, all of a sudden she pops back up in the water. and at that point she's moving so fast, she's gone so far past me that i can't even throw my rope. >> naomi surfaces far beyond the last person standing on the river banks with throw rope. and everyone knows they have to act now. only 50 yards downstream is another set of dangerous rapids