A2 is right after you open and approach and make a little small talk. You need to DHV (Display Higher Value). The best way to do that is to tell a story about something that you did or happen to you. It doesn't have to be true, but if it is, thats better because you can relate to it more. You are allowed to exaggerate.
During this time period, if you are talking to 2 or 3 or more girls and guys. You talk to all of them and somewhat ignore your target (the girl you are interested in). You ignore her and neg her (tease) in a funny way. So that she will want your attention more.
Now, this is not just any story, it is a story in which you tell all the good things about you. Like for example, how you once helped an old lady cross the street and some douche took her purse and you kicked his ass. (That example might be a little too much exagerated, but you get the picture

). Make sure it is light hearted, like don't go into detail about how violent you were, but more about how you did the right thing, and helped the lady.
In my opinion, DHV stories are about Poetic Justice.
Once, your target give you enough indicators then you go into A3, stop ignoring her, and give her some more positive attention.
Hope that clarifies things.