This is something I experienced about 2 years ago, and I can't seem to forget it. It was a short amount of time after we moved into the house I still live in now. It was in my old bedroom, which was upstairs.
One evening I went to bed, and was just snuggling like normal. Then suddenly the lights turned on in the room before mine. I was just lying there in the dark, and saw the strong light shape of my door; I just thought it was my parents even though I was pretty sure they went asleep ahead of me. I didn't think much of it. After the lights were turned on for about 5 minutes I saw a shadow shape of feet at the bottom of the door just standing right before my door. I thought it was kind of weird. It just stood there for 10 minutes without any movement, and suddenly the lights turned off. It just stopped like that...
A few days later I was with a friend of mine, and I went downstairs to get something to drink, then suddenly I heard a girl laughing quickly. I just thought it was my friend. I asked her what she laughed at, and she was like "I didn't laugh...?" I was pretty freaked out. But I am very sure that the shadow shape was an adult, as I can tell by the weight sound when it stepped in front of my door, and how thick the legs seemed to be by the shadow.
Some weeks later, my dog was acting weird. I was home alone with my dog, and it started barking. I went to check it, but it was just staring at some corner and barking, while walking back and forth. Then my dog suddenly withdrew, as if it was a bit startled, then started barking again. Today I don't sleep in the same room and haven't really experienced any paranormal since then.
I'm very curious about all this, so could anyone just tell me a bit of what it could be and such?