The effect of shooting regulation- weight object balls with an old-fashioned over- weight bar table cue ball , such that the cue ball moves forward to occupy (sometimes only temporarily), or go beyond, the original position of the object ball , even on a draw or stop shot , because the mass of the cue ball exceeds that of the object ball . Players who understand smash-through well can use it intentionally for position play , such as to nudge other object balls nearby the target ball. Smash-through also makes it dangerous in bar pool (when equipped with such a cue ball ) to pocket straight-on ducks with a stop shot instead of by cheating the pocket because of the likelihood of scratching the cue ball .