san francisco resident bill occidine is about to find out. s in his garage when an armed man suddenly rushes in. >> he looked like a hit man to me. for some reason, this is going to be the day that i die. somebody sent someone to kill me. >> a gunman threatens you in your own home. you're uparmed. what's the first thing you should do? a, get your body away from the gun barrel, b, go on the attack aiming for the assailant's body or. c, try to take the gun out of hit hand. not everyone is strong enough to fight, but royel ganion offers this tip. >> my goal is to go sideways. >> the correct answer is a, watch for the right opportunity, then get away from the gun barrel. don't just scout discount decis c. >> i got to remember the weak spots of the body, strength to the weak spots. in this case i can do a knee to the the groin. >> his technique isn't textbook. like many of us, he doesn't have formal self-defense training. >> i wanted that gun, i needed it, and i'm going to have it. >> acting on instint, bill fights for the gun and his life. but it'