This happened last year. I was 12 and my brother 13. We both were in my mom and dads room.
We were watching television when we both heard a very loud knock on the back hall door. My brother asked me to go see and who it was. I told him no, and that I had a bad feeling about this. He called me a wimp and got up to check who was at our door.
"Hello?" No response. He then knocked on the door only to be greeted by knock in response. He looked at me as if I was doing it. I assured him it is not me. He then knocked again and got another knock in response. He opened the door but nobody was there. He then yelled hello into the hall, again no response. I looked at him and said I told you I had a bad feeling. He gave me a little smirk.
We both ran into the living room to tell our mom and dad. They did not believe us and asked us if we were lying. We both said no.
My mom told my dad to go and look. When he came back from having a look, he told my mom that he had seen no one in sight in the hallway or outside the house.
My mom looked at us like we were going crazy. My little brother (7) was looking at us and repeatedly asking "What happened? Our mom said it is top secret to my little brother.
We stayed in the living room for at least most of the night with mom because we were too scared to go to the other end of the house.
Soon I shall tell another story. I have many more.