When I was in Brazil I hiked into the rainforest and would swim under these beautiful waterfalls. Some local kids were there wondering why these non locals were wandering into the forest on their own. They followed us into the jungle. Communication was difficult as they didn’t speak any English. After a couple different waterfalls I kept inviting them in to swim and they constantly refused. I didn’t think anything of it. Eventually we saw a small snake and through hand signals, I think they said that they don’t swim in the creeks because of the large snakes that could eat you. That made me pause and remember where I was. Holy shit. 20 foot anacondas. Man eaters. I had no thought of that while giddily jumping off waterfalls into unknown pools.