In the 1st quarter of the Eagles vs Roos game, an umpire made a decision for holding the ball only for a 2nd umpire to come in and say that never happened. He then ruled a bouncedown. I have seen umpires overrule other umpires with a different free kick but I've never an outright cancellation before. I had a look in the rules but couldn't find anything. Does anyone know what the actual rule is on this?