My husband and I bought our house April 2004. We had a 3-year-old son and I was 6 months pregnant with twins. We had been living in our house for 2 weeks. One night around 10:30 pm we heard loud knocking at our back door. My husband went to the door. As he reached the door we heard the loud knock again. He opened the door and no one was there. He closed the door locked it and came back to bed.
The next night around 10:30 pm the loud knocking happened again. This time my husband ran to the door, threw it open and said, "WHAT!?" Still no one was there. We were a little irritated, thinking that it was some kids playing around; however, we have 4 acres of land between us and our neighbors. We decided to watch a movie.
At 11:30pm we heard the loud knocking plus the door knob began to shake all at the same time. We both jumped up and ran to the door. The entire time we moved toward the door, the noise and shaking continued. Our 3-year-old ran out of his room and was asking what that was. My husband open the door and screamed, "WHAT DO YOU WANT!?" No one was there. So very irritated with this, he said he was going to go outside and watch the door to see if he could catch the person doing this. He went out the front and hid behind our shed which gave him a clear view of the back door. My son and I were sitting on the couch waiting... BAM BAM BAM on the back door we jumped up and ran into my room. Seconds later my husband comes busting into the front door screaming, "No one was there. Did you hear it?" I came out of my room and said yes we heard it. He said he was watching the door when the knocking happened. No one was there and he could see the doorknob move.
We have lived here now for eight years and every April we have two weeks where someone will knock on our back door, but no one is there.