I would reach over to my nightstand, grab my .40, then my 3D maglight, get up and make my way to the noise. The very sight of an intruder would be followed by shots. Not sure the amount. If I hit him and he falls, but still moving around. I would probably insert another 1 or 2 to finish it off. Then secure the premises...then hit the police button on my alarm system followed by a 911 call.