Mind you todays pinball machines totally suck. Often only giveing an "Extra Ball" if you can get it. Not to mention the cheep ass slanted boxes that suck the ball right down.
But back in the day, in my local pool hall, I would often play on this machine. I would knock down all the lite tags one by one in sequence to light up the special. Hitting it each time resulted in a new racked game for later play. Also called "Free Game". Often when sailing the ball and slaming it off the upper fliper the ball would hit the intended taget and slap the glass top.
I got so good at it I could rack up the maximum 99 free plays and sell the whole lot of em for a few bucks.
Then when thay left I would rack it up again in free game plays and sell again.
Thousands of hours. A few hundred bucks made when Pro Game Player wasnt "Pro".
http://www.ipdb.org/search.pl?any=El+Do ... quick#4638
Hopeing I get it for an xmas present.