throw-in after double personal during free throw

[just another ref]

Either somebody here described it this way or I dreamed this, but I like this explanation. One punch does not a fight make. If A1 punches B1 during a live ball and that is the end of it, I have no problem with a flagrant personal. But if this punch leads to further activity, the whole thing is a fight, which started with the start of the first swing, or perhaps even with the contemplation of that first swing, not with the actual contact. This, I think, is when 10-3-8 comes into play.