After hanging out with my occasionally super-psychic sister who that night shared that she is sometimes having encounters with creepy poltergeist type beings (I'm on the fence about whether that could be possible or just her imagination) we got in my car to leave and after looking over my shoulder to make sure I was clear to back up I saw that I was, but when I put it in reverse there was this shape of a tall person with a strangely long arm and fingers waving wildly at me. I put my foot on the brake and looked over my shoulder and they were gone, but when I looked at the screen again it was still there waving with a large grin, I whipped my head around a third time and saw nothing but some nearby trash cans, and I looked at the screen again and it was gone. ??? After I dropped my sister off at her house I felt like there was still another person in the car with me for about a half hour. Super creepy.