The joburg metro police

A very strange sight was observed on the Ben Schoeman this morning - a Joburg metro policeman actually doing his job !.  An overcrowded taxi was stopped when we passed by.  Reasonably normal .  But then this metro cop came past us on the left hand side with quite a speed and pulled off an empty taxi about a 100 metres from us.  Then we saw the overcrowded taxi following him and it was stopped right behind the empty one.  Of course the freeway was a parking garage as usual so we had all the time in the world to observe this strange happening.  He duly had passengers disembark from the one and embark onto the empty one!  Wow this is amazing - Apart from the real sense in what he was doing he was actually doing something ! Really amazing !