I had two eerie experiences out in the bush while working in Colombia and Africa. I was not hunting either time, but it was definitely wilderness, so I guess that qualifies for this thread. When we lived in Bogota, Colombia, I traveled to the Amazon on several occasions for work. On one occasion I took the family to the river town of Leticia which is on the Amazon River where Colombia, Peru, and Brazil all meet. (Leticia was one of the safest towns in Colombia since it is so far from anything even the FARC and ELN guerrillas didn't have much of a presence in the area). Leticia is kind of a frontier town like I imagine St. Louis was in the 1830s. Within 3-4 hours by boat from Leticia you still have tribes in the Javari Valley that have had none to very limited contact with the outside world. Men from the Ticuna, Huitoto, and Yagua tribes come into town to trade, sell skins on the black market, etc. There are some men who are both fluent in Spanish/Portuguese and the many indian languages of the area and they act as a go between and often travel for weeks into the forest to trade.
One one trip we took a boat up river about 2 hours to Puerto Narino and I found a Ticuna indian (since the area north and west of there is Ticuna land) with a canoe with an outbound motor who agreed to take us north on the little tributaries and fish, do birding, etc. He told us about a tree that kills other trees so we decided to go check that out and see if it was real. There were certain areas of the forest that he was very leery about and said that we could not stop as there were evil spirits in that part of the forest. The Ticuna we talked with also described a lot of animals that are not recognized by science and were not in any of the field guide books I have. It was interesting because they didn't exaggerate these animals as being special or unique. For example, when I asked about what cats there were, they described a jaguar, puma, ocelot, margay, and a cat about the size of a puma but with much longer canine teeth that the rest. Both Ticuna I talked with spoke about this cat just as matter of fact they did about a jaguar, peccary, snakes, etc. without sounding excited or trying to get me interested.
On the same trip, we also spent some time with a Huitoto guide in the area due north of Leticia. We got to a small village where they had just killed a jaguar that had attacked a hunter. The Huitoto also believe in a lot of the same animals that the Ticuna guy told me about but they are adamant about being out of certain areas by dark when they believe El Dueno de La Selva (Lord of the Forest) walks around. They described it as a dwarf-like being that has feet pointing backwards and can imitate any voice. They give a small offering anytime they hunt to pay safe passage in order to hunt and kill an animal. This being will often lure children out into the forest by imitating the voices of their parents telling the child to go deeper and deeper into the forest until they are lost and even their best trackers would lose the kid's sign at a certain point, as if the tracks suddenly disappeared and there were only a set of human like tracks that appeared to be walking backwards.
I know that a lot of indigenous tribes are very superstitious and believe in things that we think are strange (just like they think some of the stuff we believe is crazy) but it was interesting to see experienced hunters that had just killed a jaguar with spears be absolutely terrified about a small dwarf-like creature that lures children away to their deaths. But there were a few times out there when the hair on your arms would stand up and you would feel that you were being watched. Most of the area is triple canopy so it is fairly dark even during the day and your eyes get tired and play tricks. Sometimes it would look like there was a man up ahead but when you got there it was some twisted vines. GPS didn't work because of the canopy and all the creeks look the same except where there is occasionally a fallen log to cross over on. But it was weird because that haunting feeling only occurred at certain times even though the entire trip was in similar terrain and vegetation. We also saw jaguar prints on top of our tracks that we had left 2 hours before. So I know there were lots of sets of eyes watching us. But that didn't phase the Huitoto we were with, it was that other thing that they feared.