On the Speed Machine table I get an extra ball at 10,000 points. Sometimes I get more extra balls by accident, but I'm not sure how. A few times I've even gotten up to 7 balls total. How does this happen?
For clarification, when I say "extra balls" I'm not talking about the police chase or when you lock 3 balls at the top left for a multiball mode. I'm talking about extra turns.