When I was 13 I lived in a small apartment with my mom, dad and my 10 year old brother. The apartment was about 10 yrs old and the floor was so old and creaky and the carpet had worn off of it. Anyway, my brother and I used to play around, poking our ribs and tickling each other. One night, I was half asleep, half awake on my bed when I felt this hard poking sensation on my left ribs! It sat up and looked around to see if it was my little brother but he was sound asleep on the other side of the room. I thought I saw a short shadow (kind of like a small kid's) down the hall. I was so scared that I couldn't move to get up and go check it out. I just covered myself with my pillow and after a while I managed to fall asleep.
Another time, my brother came out of the bathroom screaming at me, asking why I came in the bathroom while he was taking a shower and why hadn't I knocked or something. I told him it wasn't me and that I was with mom all the time. He refused to believe me, because he said he saw a shadow through the curtains. My dad said that one night he was suddenly awoken by a hard hit on his stomach. My mom said somebody "grabbed" her buttocks while cooking, she looked around and saw that we were all in the living room at the time.
We had all had our own scary experiences in this apartment. We came to the conclusion that the things that happened to us were like a small mischievous child being naughty. We moved a few months later, but not because of the strange happenings. We haven't had any strange things happening since then. It's been 4 years. I would really like to go back to that apartment one day.