I am the one who knocks

I'm not likely to suffer a harm or injury, Skyler. I'm the person who causes the possibility to suffer a harm or injury of other people around me. A male human turns his closed door open by moving it and after that the said male human gets a pistol fired on him and you accuse that male human who got a pistol fired on him after turning his closed door open by moving it of being me? That is not correct, I am the person who makes a "knock knock" sound by slowly hitting the door.