I saw light green sphere landing in the near forest. It was raining hard that evening. It could not been rocket or any other manmade thing because of its flying route.1. I was laying on the sofa and watching TV (facing window). 2. I saw very light green sphere object flying in the sky.3. I thought immedially that thing must be UFO. Green lights were flashing and its flying route was boomerang-like.4. Boomerang-like flying route, very light green flashing lights, sphere shape. Object was flying in the near forest.5. I jumped up from the sofa and went close to the window see. I was horified. It was very quickly over but could not sleep next night at all.6. I lost sight of the object when the UFO landed into the forest (approximately 500 meters from our building).