Fight it

You quickly slam the door and lock it then turn around to face the shadow. You start throwing punches that doesn't seem to faze it. It tries to grab you but you dodge out of the way. You head for the living room and grab a iron bar that sits next to the fire place. The shadow is back on you but before it can grab you, you swing and poof the shadow is gone. You try to catch your breath and try to figure out how this all start but are soon interrupted by banging on the doors and windows.