We're talking about continuation. Let's just bear in mind that when you look at Krav Maga technique the way we show them that we are showing you the material as it appears written. This is not necessarily the way you are going to conduct combat. As a matter of fact the goal is to eliminate a threat. Once you've eliminated the threat, once the threat is no longer significant, you'll extract yourself from the situation as quickly and efficiently as possible.
That means that once you started to fight, once you've said this situation is dangerous and I'm shifting into a place that we are exchanging punches and blows or anything that had to do with it you are engaged and you are firing. There's no stopping unless there's no longer a threat. You should be committed to continue and strike as many times as it took.
If it took you two punches or a punch and a kick or a nice good strike to the groin that ended it, I'm very happy for you. Once again you have to understand that if you are training and preparing properly you have to prepare yourself for the worst case scenario. That means that you should be committed to continue and strike the individual as many times as you need in order to put him away.
When you're done you should still expect that his friend is going to be there as well and you're going to have to do it all over again, maybe more than once. Therefore, you need to understand that we don't just throw one or two punches the way you see material done. We always try to continue to assault more and more and more.