[QUOTE=Scrapper1;826616]Block. Once a player is airborne, if t
he defensive player moves to a new spot, the defender is responsible for the contact.
That is NOT entirely true! If you are picturing B1 sliding sideways under an airborne A1, yes, but I don't believe that is we have been talking about.
Once LPG has been
initially established, he/she may move sideways, obliquely, and backwards to guard a player. If A1 is driving to the hoop and goes airborne and B1, who is in front of him and had LGP, then moves backwards and gets croaked (even if B1 is moving) it is a PC foul all the way. Too many coaches and newbie refs think B1 can't be moving at all! Another MYTH.