While Norton is calling his pool shot he states the 8 and 15 ball will go into the corner pocket. With all the balls still on the table Norton would lose if he sinks the 8 ball.
Norton shouts after Harvey, "A pox on you and all your ancestors!" presumably he meant to say "descendants" rather than "ancestors."
Flubbed line: Norton says, "A slip of a ship can sink a lip." The correct saying is "A slip of a lip can sink a ship." It is possible, though not likely, that this was intentional.