Bingo!

As the door opens, you rush to the front, and immediately have the jump on Neil. By this time he already registered that you are not on the mattress, but you still manage to strike his neck with the electric baton. He drops to the floor, incapacitated. You lean down, and grab his gun.

You want to move on, but then you find yourself with a choice: You could shoot him, and pave way to your visceral anger. Or you could leave him like this, and try to get something useful out of him later.