Or do you run over him? Actually I would try and get away if I can. If my care is blocked and I have no escape route I will have my gun in hand and give him orders to stop or I will shoot. If he begins to beat the car I will be ready to shoot and to prevent injury or death to my self I will shoot to stop the threat. Notice I said stop the threat not shoot to kill. If in shooting to stop the threat he happens to die then so be it.
By faith Noah,being warned of God of things not seen as yet, moved with fear,prepared an ark to the saving of his house;by the which he condemned the world,and became heir of the righteousness which is by faith Heb.11:7