Active house

Earlier today we were sitting here just talking and Karen was talking on the phone and we heard a really big banging and the person on the other end of the phone also heard it. It vibrated the rooms we were in also. I went to see what it was. Seen nothing or heard nothing upstairs. Karen and our youngest daughter went upstairs to the bathroom while I went back downstairs to check out the beasement. At about the same time, Karen heard noises from within our bedroom and the door knob turning and I opened the basement door and turned on the light to see a tall dark figure at the bottom of the basement steps disappear. We went to get my cousin and came back home. We were here for a little bit just sitting around talking and there was a loud knock at our kitchen door we all heard and even had our dog barking. We looked and there was no one there.