Just as an aside, it's amusing that it seems the majority of spectators don't have a clue about the advantage rule, as evidenced by the howling and booing every time an advantage fails to accrue and the ref calls play back for the free. People either didn't see the the original foul or have assumed he got away with and haven't noticed the referee's raised hand or, if they have, presume he's waving to his mates. Then when he blows apparently for no reason, they go crazy.
What's not amusing, but annoying, is when paid commentators and overpaid "pundits" react the same way.
That's not to mention the bemusement when the umpires make the "Hawkeye" signal and the same clowns interpret it as the wide signal and then say Hawkeye overruled the umpire, whereupon the producer orders a close-up of the properly performing umpire in order to shame him before the nation.