Third day in the jungle – A warning or an invitation?

A weird dream troubled me today, and its timing is what confuses me the most. We’ve just left the Cuiabá streets, fully stocked and ready to go through the jungle. It’s been over a month of preparation, double checking all of the necessities. We’ve entered the wilderness and moved forward to the first tribe’s location. We will travel through the first river today. Everything goes according to plan, everything seems to be fine. So why should I be worried about such a ‘warning’?