I believe the UFO sightings are driven by these type of entities.

I was sitting in my living room by a window reading a book. Suddenly I saw a black shadow on one wall moving back and forth. I ran into the dining room where my sister was sitting typing. I yelled there is something in the room pointing to the living room. The entity flew around the room twice. We heard a very loud noise what sounded like a train or helicopter over the house and a loud horn. Suddenly a bright yellowy light came through the window I had been sitting at and the entity entered the light and disappeared. What we later realized we never mentioned it to our parents. Seems we blocked it from our minds until we were adults and started talking to each other about what happened. We did see a face in the black entity. We were to afraid to go outside to look for anything. We only heard what had to be an ariel object above the house.