From Redditor /u/burkdoggiedog:
Around three years ago, my girlfriend was house-sitting for a family friend of my parents. Long story short - it was the summer of her junior year in college, and she had found a good internship near me so she lived there while the family traveled all summer long. To set the background: this house is in the rural parts of North Carolina, surrounded by woods on all sides, and the driveway takes about five or six minutes to drive down on average.
Her bedroom she stayed in was directly facing the driveway and out to the woods. The second week she was staying there, I drop her off maybe around 1:00 am after we have spent all day up in the mountains hiking and spending time with friends. We say our goodbyes, she closes and locks the door, and I walk back to my car.
Not even 10 seconds after I reach my car, I get this awful feeling that something is wrong - and right after that, I hear my girlfriend's scream out the most terrifying scream I have ever heard. I rush back to the door, but it is still locked - I try all of the windows and other doors (this house is three stories and around 5,000 square feet). Finally one of the bathroom windows on the basement floor is unlocked, so I climb inside.
I rush upstairs to where she is and right then I see a tall, hooded figure bolt out of the room and jump through the front bay window (in her bedroom). I start to chase, but they stand up and run into the woods, so I stopped running after because I did not know if they were alone. We call the police and they come out and search the outer perimeter, but that is it.
After it is all said and done, I ask my girlfriend what happened. She said that she went into the room she was staying in and had her back turned to the door. As she was setting her stuff down, she hears footsteps and then a voice say, "Finally, we are all alone."