This is easy. 1st if your going to be armed either in your home or on the street as part of your training you should think out every what if in the world before any of them come up. 2nd If your not willing to take a life in your own or someone elses defense lie down play dead and hope for the best. 3 If hes big or small you can never tell of his true intent (If hes in the house is has some bad intent) ( Charles Masion is a very small man), training, back ground, drug use etc. And I could go on and on. But cutting to the chase If he in my house he has sealed his fate..............