Dream About Dark Room And Tapping On Windows

My family and I was having a big dinner party at home. I welcomed the guests in and sat them down. I went into another room and everything changed. It was dark, all the lights were out and everyone in the room was laying on the floor scared and trying to be quiet. I told everyone to stay down and not to look at the windows when they hear tapping. There was big windows everywhere with curtains. You could see through the curtains slightly and u can see a silhouette of a branch like arm tapping on the windows. I got down on the ground and slowly crawed to the living room and found the same thing there, everyone crying and afraid laying on the ground.