I was watching a little bit of a pool match. It appears that a 20-second shot clock was used, as they would sometimes display a countdown starting at 20.
But it's not clear to me how the shot clock worked. For example, at 45:35, the player takes a shot and makes it, and then the cue ball comes to a stop at 45:43. But then the shot clock doesn't start until 45:53. Then at 46:04, the shot clock is down to 9 seconds and it disappears, but the player hasn't taken his next shot yet. Then at 46:23, the shot clock reappears starting at 20, and the player takes his shot with 9 seconds left.
So my questions are:
- When does the shot clock start?
- What causes the shot clock to stop and reset before a shot is taken?