Her hands were doing something wwhile endlessly talking

I don’t know how she did this.

I had my teeth cleaned yesterday by a certified dental hygienist.  So, I was accompanied by my wife in the tooth cleaning room.  All the while I was being scraped and flossed, the young dental person talked endlessly with my wife.  How did she do that?  It was something like talking without any ‘periods’ between sentences.  None the less, it was almost as if she was just doing the dishes in the kitchen while chatting with a neighbor.  Yackidy yackidy yack.  How does one talk forever about her preschool kids and do her dental work as well?  Truly amazing.  Is this one of those “I could do it in my sleep” moments?  Jumping Jack Flash!  How could she ever do this while babbling on and on?