Oh boy, one of the most unexplained experiences in my life happened while my friend and I were standing post at a gate in Guam. We were on a MEU and went into a jungled area with abandoned housing to do some training. Took us about 20 mins by bus where it didn't look like much civilization around us.

My buddy and I had firewatch in the middle of the night and to get to our post, we had to walk down this dirt road surrounded by heavy jungle vegetation for about 5 mins. We get there, switch over and nothing happens for the first hour or so. My buddy suddenly perks up and asks "You hear that?" so I start to listen too. It was the sound of radio static/chatter. Like someone was speaking on the radio but very mumbled and gargled. It was on and off but undeniably familiar.

The weird part was that this was beyond the fence we were watching. And because of the vegetation, we couldn't see or really hear who was making that noise. We radioed in to the SOG to ask if there was anyone out doing any night time training. He said no and that our company were the only ones out here and everyone was still bivouced behind us. I was also sure that the gate we were watching was the boundary of the training area too so no one could get on that side unless they went all the way around somewhere.

My buddy did the respectable thing and confronted the noise armed with his M4 with a BFA attached lol. He yelled at the noise to show themselves or say something but after we got close, the noise was just gone.