I ring your doorbell. As you open the door I kick it in. I'm holding a gun.
I tie you to a chair. I sit on your lap facing you. I tie my body as best I can to yours. I push my forehead against your forehead and look you in the eyes.
I put the gun in my mouth and pull the trigger. Your ears ring. My body weight awkwardly pulls the chair to the ground. Your hands are tied behind your back so you have no way to bracing yourself. You hit the ground hard.
The fist sounds you hear are the blood pumping from the hole in my mouth. It's coming out in a rhythmic stream. For the next few minutes you feel my chest convulse as my lungs try to fill themselves with air. It's the most horrible sound you will ever hear.