Jumping was always legal, just not too many people could do it well in the 80s. "Lil Earl" Strickland wasn't the first to jump, but he was the best at it. I heard about how he did it and practiced until I was nearly as good (Earl could always jump better with a Meucci).
One Foul was the tournament rules to speed up play, but they were always looked down on by the gamblers. As "One Foul" took over through TV exposure it filtered out "Shoot Out" and gambling at 9 Ball......we never saw it coming until it was too late!
One foul 9 Ball is not a good gambling game...as a matter of fact it's a terrible gambling game, but the players seem to think they have no other choice. 'Two Shot Shoot Out' must be brought back or one foul will continue to dilute the game down into nothing.
'The Game is the Teacher'
When the top players started jumping balls, the rest of the pool world scrambled to learn how to do it. Playing any two fouls, you were in deep without a life vest if your opponent rolled to a jump shot. You had to kick and hit the ball, turning whitey loose, or pass it back and take your chances.
I learned how to jump right away (with a Meucci

I was gone when one foul took over. I was hoping it was a passing fad for lesser tourneys, but I saw the pros doing it, too. I understood kicking at the ball because I did it all the time from playing in ring games. It was nothing new. We used to call it, "breaking again" on the bar table. :grin-square: Watch out banana ball!

Best,
Mike