I'm actually close to underweight compared to other Georgian guys my age.
Seriously, everyone here is loving huge. It must be in the air.
But anyway, I've taken a few self-defense classes. You need to react very quickly. If you think he might punch, don't let your guard drop low either. He may fake you out and kick like you said, in which case you're screwed if you were focusing on the upper part of your body.
Try to determine what he's doing based on his approach, and where he puts his weight. React based on your opponent, not based on past experiences. I believe in honorable combat as well, but if you want to go for nerve attacks, go for right between the neck and the shoulder bones. This is a soft spot and will disorient your opponent very much so and make him gasp for breath. You decide from here - he will probably clutch his neck and fall down. I wouldn't kick him while he's down, call it off here. You don't want this to be any more than it needs to be.
