san francisco resident bill occidine is about to find out. ll is 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 unarmed. 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. -- his hand. not everyone is strong enough to fight, but royel ganion offers this tip. he teaches krav maga. >> when i have the moment to react when he's not expecting it, he looks left or right, 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 discount decisions b and c. they're your next steps to surviving an armed assault. >> 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 groin. >> his technique isn't textbook. like many of us, h