b e l i e v e

So I'm sat playing The Forest in Vegetarian/Adventure mode (because I want to explore the sinkhole, darn it) and in my haste to build the platforms and get down into the sink hole I make a platform too low down for me to jump back up, so I fall to my death and let the game take me into the caves. Now this is where it got weird...? I make my way out of the caves and head back toward the sinkhole (guided by my trusty flag icon on my log sled) and on my way there, up on a ledge I spot a humanoid figure. Now, I'm on the mode where there aren't supposed to be any cannibals so I'm a little weirded out. As I get closer to it, it turns and runs away and I chase after it but unlike usual, when you can see the crazy cannibals running away/around, it's completely disappeared. So I'm wondering has anyone else encountered this? Is it a scripted type of thing or did my game just glitch?

Mystic: No, Instinct.