I had a bad experience in a forest one night not too long ago, but it had nothing to do with zombies or bigfoot or other annoying nocturnal entities. It was all the fault of my companions.
This is probably pretty much a tl;dr crappy English non-story, unlike some of the others posted here, but I think it says something about human behavior when confronted with something unfamiliar.
What happened was quite simple: a friend of mine had just turned 26 and his family threw a party in a farmhouse somewhere west of Brussels. The farmhouse was an ideal spot because it had all the space a drunk crowd could need for a birthday party. It was located in the middle of nowhere, and we could make lots of noise without being hassled by neighbors or cops. Around nightfall we decided to take a walk in the forest outside. eight of us set out for a stroll; two people who know the place inside out, the rest of us had never been there before. We had three flashlights (one was mine, I always have one on me). There was no moon and the weather was bordering on rain. The forest was literally pitch black. And we had two annoying, nervous little girls...
So we strolled and strolled, until we found ourselves in a spot that we deemed comfy enough to sit down and chatter away. But the little girls started acting more and more scared. They became so annoying that the two people who knew the forest decided that it was time to escort them back home. The other four of us didn't want to leave, and agreed to head back after the first party had left. We said goodbye, and we watched their flashlights light up the trees around them, until they were gone.
After about a quarter of an hour, we saw new flashes in the distance, pointing at us, but coming from another direction than the one our friends took. We pointed our flashlights toward it, but there was nothing to be seen. The flashes kept shining on us for a few more minutes, and then they stopped. No-one revealed themselves, no-one came up to us. We just dismissed everything because we assumed that it was one of our friends who had snuck back to scare us a bit. But it did make us want to return to the house anyway.
I did still have a general idea of where we were, but my friends all had different opinions. Because we were just having fun we didn't really want to get into survival mode and try to get out as fast and efficiently as possible. We just naively allowed ourselves to become completely disorientated, and that's when the rain kicked in. I grew aware of the fact that the forest was becoming more dangerous; there were very slippery slopes and holes everywhere. I didn't want anyone to fall and break something, so I wanted people to stick together so that no-one would get lost. One of my friends wasn't so concerned and kept on changing his mind about which way to take. He wouldn't have been such a problem if he didn't constantly wander off, preventing us from walking in one fixed direction. He forced us to keep walking in circles. His girlfriend got more and more anxious because of his behavior and she kept screaming at him. Another friend didn't want anything to do with the situation anymore and for some reason started playing all his ringtones on his cell phone on maximum volume, and he just wouldn't quit. Seriously, I wanted to kick the guy in the balls and break his cell phone on his skull.
Meanwhile we're wet, our vision is impaired because everything is pitch black, and the flashlights keep throwing scary shadows. Our hearing is impaired because of the screaming and the ringtones... All the time I'm still kinda thinking about the weird flashlight we saw in the distance. Someone could still have been out there, and he wouldn't have any trouble following us without being seen.
Long story short, we got out safely. But I was astonished to see how quickly people start behaving irrationally! It literally took us no longer than 15 minutes to start screaming at each other. The thing is, you can learn to control your own emotions and irrational fears if you put some work into it; but you can never really control how other people act in strange situations, and that's what I think is the scariest of all.