A childhood belief about under my bed

When I was a kid, my bed was pushed up against the wall and since it was near a window, I always heard weird noises at night (cars going by, cats, birds, etc.) so I deduced that people/things lived in my wall and at night they would reach out and try to grab me. So, I always slept on the part of the bed furthest from the wall because I thought they're hands were like an inch from my back and if I turned over they would grab me and pull me into their "wall-home"