Never come that close. While I've been ready (hand in the pocket on my pocket carry) to draw, I've never been put in a situation where I've had to. I guess the closest would be a couple of guys approaching me at the gas station while filling up... asking for money. Situational awareness picked up on them from a distance and before they could get close... one hand went in the pocket to grab the grip on my pocket carry and the other hand pointed right at them while I looked them in the eye and said pretty firmly "You should stay over there because I've got nothing you would want over here!" They got out a "hey man, can we borrow..." before they stopped their approach, turned around and walked away.

Other than that, I've never been close to shooting someone. I suppose I wasn't even close then... just making sure I kept it that way.