Driving my utv on a trail threw a field on the side of the mountain. When I stopped to look over the valley below, I seen the trees behind me have a grew glow coming threw them. I thought it might be someone with a green light or a laser pointer so I moved down the trail a bit more when I looked right above the tree tops and their was a glowing green object about 200 ft above me off the hill. It just sat there I got a feeling telling me to leave. I went down the hill to the bottom of the field and it followed me, I didn't see it but the ground and tress around me had that green glow. I took off as fast as my machine would go, I got anxiety from it and started throwing up when I got to my friends at the bottom of the mountain.