After completing our three-hour boat ride down the river, our group arrived at the retreat in the pampas this afternoon: in time to have some fun on the rope-swing river kamikaze! The campsite has a tree right on the edge of the river, and there's a big rope with a wooden foothold tied to one of the tree's biggest branches. You grab the rope from the muddy shore, and you swing out over the river. Then — splash! — you bomb into the river's peaceful waters. We all had a turn on it; we all survived; and we all created some massive shockwaves in the water.