I thought you meant an extra ball truely at the end of the game.
At the end of a game of TAF, if there are any balls locked, it shoots them out of the swamp at the right flipper.
For some reason the flippers stay energized long enough for you to make a one-timer off that kickout. I love shooting for electric chair hole.
I think it would be great if the game was over, all the bonuses were calculated and then it shot one last ball down -- if you could make the "skill shot" you would get a bonus ball.
But hey... that's just me.
Chris