TARGET BALL SPORTS :
Pool or Pocket Billiards

Pool, also known as pocket billiards, is played on a retangular table with six pockets into which balls are driven (shot). There are fifteen colored balls, numbered one to fifteen, and a white cue ball. The cue ball is driven with the cue stick against one or more of the other balls knocking them into the pockets for a score. If the cue ball falls into the pocket, the player loses his turn and is penalized.

IDIOM: call the shots
pool

MEANING 1: In pool a player says where he or she is going to hit theball.
SENTENCE 1: She called the shot. I am going to put the eight ball in the corner pocket.

MEANING 2: to tell someone what one to do
SENTENCE 2: I am going to call the shots on this deal.

IDIOM: behind the eight ball
pool or billiards

MEANING 1: The player must knock all numbered balls from one to seven into the pocket before the eighth ball.
SENTENCE 1: The six ball was behind the eight ball and it was a difficult shot.

MEANING 2: to be in a difficult or awkward situation
SENTENCE 2: I was behind the eight ball when the boss found out I didn't know any foreign languages.

DERIVATION: It is very difficult to make a shot with a ball, if that ball is directly behind the eight ball.

Waiting for "H" hour, Colin H. Powell thought of pool. "He had written out and tucked underneath the glass on his desk a line from the movie The Hustler: 'Fast Eddie, let's shoot some pool.' It was the moment of confrontation."
Woodward, The Commanders, p 374

Bowling

IDIOM: to bowl someone, something over

MEANING 1: The goal in bowling is to knock over as many pins as possible.
SENTENCE 1: She bowled a strike. She knocked over all 10 pins with the bowling ball.

MEANING 2: to make a very good impression on someone
SENTENCE 2: She was bowled over when I gave her a doxen roses.