Better to pause then to rattle. Especially, if you are trying to convince someone of your point.
It gives you focus. Ever attended a meeting where everyone just jumps in to give their point of view? Ever presented and have someone in the audience saying one point after another and before you can complete your sentence, she is at it again? As if rattling her submachine gun mouth will kill the idea that she does not like.
Sometimes they are known to have two kills with one shot too.
What do you want to shoot down today?