it begins when the striker's mallet contacts the ball and ends when all balls set in motion by the striker have stopped rolling or have crossed a boundary.

(sports) the act of swinging or striking at a ball with a club or racket or bat or cue or hand; "it took two strokes to get out of the bunker"; "a good shot require good balance and tempo"; "he left me an almost impossible shot"

sports equipment consisting of a heavy metal ball used in the shot put; "he trained at putting the shot"

an action which begins when the cue tip contacts the cue ball and ends when all balls have stopped moving.

Snapping the marble from the hand with the thumb from where it is held against the ball of the first finger. Knucks, of course, must be down.