This little video pretty well says it all.
Josh Smith starts driving the lane for what is normally a monster dunk, but Dwight Howard is there so he goes with the floater. Howard skies and gets away with goaltending (that ball was on its way down). While Josh Smith is flapping his arms and moaning about the call, the Magic are on a break that results in a dunk and an easy transition bucket.
Magic defense, Dwight Howard, easy bucket for Orlando. Pretty much the entire game right there.