The Jump Shot BY BYRNES
The jump shot in pool has become a popular weapon among today’s top players in recent years. Opportunities for jump shots also come up in three-cushion billiards, but not nearly as often. Billiard jump shots are more often used in exhibitions than in games-still, there are a few positions where they are practical, especially for the aggressive players.
The way I understand the rules now, jump shots are legal provided no ball touches the wooden part of the rail; a ball riding along the top of the cushion before falling back onto the table is okay.