The Fake Wall in the Walk In Closet

I moved to a new house because my dad was laid off. We got an old 2 stories house and I had a basement room that was old and smelled of mildew. I was packing my things in and I kept hearing these knockings on the wall. I told my dad, but he said it was old pipes. One day, I told my brother mike to come down and listen to it. He listened and said it was pipes. I responded "it isn't pipes you retard" and he shoved me. I fell through the closet and knocked my metal model of a honda civic through the back. It was fake so me and mike took it off and walked in. It was a staircase, we then got flash lights and walked down and opened an old wood door. It was a room with old storage items in it. We walked over and then the door behind us closed. A huge blur of white came right at us screaming in a horrid tone. We were in pure terror, we ran up and told my dad. He came down and looked at it, walked down and right as he was opening the old wood door, the door knob started to rumble and shake. He ran up the stairs and the next day we moved out.

This is the first time I have ever spoken of this, we have all tried to forget it.