I have a few stories to share.
So when I was about 9, I was sitting in my living room playing Madden NFL 09 for no reason. I had all the lights off in the room and the only lights were coming from the TV. Keep in mind that my first story window is still about seven feet off the ground. For no particular reason I felt like looking to the window, so I looked over. In the bottom right corner of the window was a pale white pace with black pits for eyes and a mouth. I was so shocked and terrified that I couldn't move and I couldn't scream for about 5 seconds. My eyes were just locked onto it. Once I could actually move, I cried and ran to my dad who was in the kitchen, who took me up into my parent's room and let me talk to my mom.
Next story.
This still occurs today, and it still scares the living shit out of me.
So in my house, I always get this really terrifying and dark feeling when I walk down my hallways or up staircases, and I always look back. About once or twice a month when I look back, there's dark apparition of a tall man standing at the bottom of the stairs or at the end of the hallway, and I always get this really dark and drained feeling when I see him. So I basically will run up to wherever I was going, and just let myself calm for a little bit.
However, that's only the most common place I see him. I see him in other places as well. Sometimes I will be in my room, and I can see him either in my bathroom or I can hear tapping coming from the hallways. I would video it or see if I could take a picture, but I always either run away or pretend it's not there. The only other person that this happens to in my house is my sister, and it doesn't happen to her nearly as often. Based on research I've done, the drained feeling is when a dark spirit takes energy from you and uses it to manifest itself.
I really am not sure what this thing is in my house, but it still does this, and it scares me pretty bad. The worst thing is the dark and dreary feeling I get when it's around, or when I see it.