Activity In The Garage

I live in a big house with my family. The house is about 17 years old, and my dad built it himself. The property was untouched when he started building the house. Only a big forest and a couple mountains.

I am 15 years old, and I have a lot of friends. And when I started having girls' nights and sleepovers, my room became kind of small. Therefore, my dad built a "teenage" room on the garage-attic. Its a TV, stereo, and one big sofa. It is a long stair from the garage-attic to the hallway. At the attic, there is two tight tunnels inside the walls. One at each side of the room. It is a great room, it really is, but I don't like it there.

About 3 or 4 times when I have been on the garage-attic, something strange has been happening.

Once, I had my best friend at a sleepover. Even though my room was big enough for us, the garage-attic was bigger. So after a long evening with a lot of movies and sweets, we decided to go to bed. We wanted to sleep at the garage-attic, since we already had made the room so cozy and nice.

I told her I was just going to get another blanket from the living room in the house, which is a couple hallways from the garage.

She said "ok" and I left for about 2-3 minutes. When I came back with the blanked she asked, "I thought you said you were going to get a blanket from the living room? And who did you talk to?" and I said that I did got a blanket from. But I didn't understand what she meant "who I talked to".

She said, "when you left, you were just standing outside the door! I heard you, or somebody, talking quiet. I could also see your shadow through the doorcrack". I told her "that was NOT me!" and there was no other than us two in the house.

We did not sleep at the garage-attic that night.

Another time, when I had two other girls at visit, we went to the garage-attic to watch a movie. In the middle of the movie, I had to get something from my room, so I ran quick so I wouldn't miss anything of the film. When I arrived at my room, I couldn't find the thing I was looking for. It took me a couple of minutes, before I found it, but when I had it and was ready to go to the garage-attic, one of my friends were suddenly standing outside my room looking scared. Her face was a bit pale.

I asked what was wrong, and she said "We heard something coming up the stairs. At first we thought it was you who just had been very quick finding that thing on your room, but it wasn't. I went out to see, and nobody was there! I went back in to the movie, when suddenly we heard slamming inside one of the tunnels!"

I searched through the whole garage, both times, and I couldn't find anything that could've made those noises. I asked my parents and my siblings if them had been there, and nobody had. Is this a ghost? Why would a ghost suddenly appear on our garage-attic? There haven't been any other houses on our property or any deaths. What is this? Also, there has been unexplainable electricity and power shutdowns.

Thank you for reading, and please comment if you know anything about such things as this.