I have never seen one, but I believe that one is living in my house. (Maybe not anymore because I have never seen anymore signs). Well anyways, it was a rainy and stormy day, lots of thunder and lightning. I was in 6th grade and I just got home from school. I was sitting in front of the couch with my dog (because she was freaking out) watching spongebob. I had a little sister at the time who was about a year old and we had a little "microphone" that allowed me and my parents to hear my little sister just in case she started crying or something really bad happened. Anyways, I was watching spongebob with my dog when the biggest crack of thunder you can imagine shook the house and all the power went out. Tv, lights, everything. So my dog and I are sitting in the dark and I'm kinda freaking out. Suddenly, a door that connects my garage to my house begins to slowly creak open. (the wind did not open this door because there was no wind that could reach this door). Suddenly, the door slams shut and my dog gets up and gets ready to meet whoever walked into the door. Her tail was wagging when she got over there, but suddenly the happiness went away. Her tail stopped wagging and she became still. She was staring at something. I got up and went to check, but nothing was there. The dogs eyes followed the "nothingness" to my stairs. I go to sit down and my little sister baby microphone suddenly goes haywire. There is crackling and banging in the microphone. I'm sitting there listening when I hear her closet door open and slam shut from downstairs. This is all true and none of it is made up. Later, I did find out that lightning did strike my house and shut everything off. (That was very expensive to fix).