A shooter's shot is considered completed after all balls have come to a final resting position. There is a 5 second window during which if, a ball shifts, turns or otherwise moves by itself, the ball shall remain in the position it assumed and play continues. The movement of the ball(s) will be considered a continuation of the player's shot. 

A hanging ball that falls into a pocket by itself after being motionless for 5 seconds (or longer) shall remain pocketed and play will continue as if the pocketed ball(s) did not occur. If the hanging ball is the 10-ball or the cue ball, that ball should be replaced as near as possible to its original position immediately prior to the incident and play continues. 

NOTE: In regard to coaching leagues, no coaching is allowed once all balls come to rest and it is the incoming player's turn at the table.