"the defender must be "set" in proper defensive position; he can't step in the way of a player already in the air, and he can't be moving forwards. But contrary to popular belief, the defender does not need to be standing still. A player can move laterally or backward and still draw a charge call, so long as his torso is in position before the shooter begins his upward motion."

the fact that the ref went to review and REVERSED it, as if it was clear enough to overturn, is ridiculous. Not only that, but as JVG said, how come you can change that call but not other crucial calls? Bad look for the league on a pivotal play in the series. Can't blame it all on the refs but they chose an awful time to blow a call WITH review.