of course i would. i'd knock on his door. "police, open up." in this case, he would open the door and respond to questions/comply with instructions. if there was actually anything out of the ordinary, i'd put my hand on my gun. if there were any indication of him being a threat, i'd take the gun out of the holster and tell him to put his hands on his head and face to the wall/ground and frisk and cuff him while the place can be searched. then more questions, etc. etc.
screaming "IF YOU MOVE I WILL SHOOT YOU AND YOU WILL DIE" is not caution, it's wanting to flopping your power richard around.