Tram Driver!

Yesterday, I was getting on tram.
And suddenly the tram driver stopped the tram and got off from the tram and went somewhere.
at that time I was wondering if where he went.
a few minutes later...
the tram drive came back with Coca Cola!!!
what the hell??
this is this culture that we can't accept in Japan or we don't predict that it happens in Japan.
But I am used to accept it because this is Australia so it happens normally.