A free game.   With the electronic knocker

Your 1/2 right Daniel. It is a free game but it's only the one I win on" specials"..don't mind a match or a free game won by score.
On the machine I'm talking about the prize continually rotates from free ball to special to a score bonus and I curse each time I end up winning the specials because a free ball or a score bonus would be much more useful to me than a free game on my own machine.
It's one of the few downsides to owning your own machine I guess.