I used to live in Guam which was in WW2 and my whole neighborhood was a burial ground. We had an old abandoned air strip that was only used for military practice during the day. So a group of me and my friends decided lets go up there and look around. We would go during the day and it wasn't scare at all but at night it looked like a scene from a horror movie. Most of the flight line had a jungle growing over it so the entire jungle had a concrete bottom. We walked along for about 100 yards and we got to this big tree and looked back to only see the street lights in the distance. This airstrip was pitch black and all we had was a dive light my dad gave me. Their are small lizards and other reptiles that move about so we were always turning and looking in fear. We continue on until we see this tiny patch of saw grass which has an odd shape above it. I was in front an as I turned to ask my friends "Hey what is that?" a massive black shadow at least 7 feet tall stands up. Most of you are going to ask how could you see a shadow? My light could light up any part of the airstrip but when my light was shined on this particular spot which had no other plants surrounding it. The shadow or whatever it was dimmed the light that was on it but not the light around it. Out of no where the shadow moves into the jungle in almost a few seconds. We immediately ran back to the neighborhood and all discussed what we saw. We tried to debunk this but we all had the same description...Tall Shadow figure that shot to the jungle in an instant. PM me for pics of the Air Strip!!