er...

interjection
used to express or represent a pause, hesitation, uncertainty, etc..


(having a B&W pause...)

"The pause-that impressive silence, that eloquent silence, that geometrically progressive silence, which often achieves a desired effect where no combination of words, howsoever felicitous, could accomplish it"
Mark Twain



"The right word may be effective, but no word was ever as effective as a rightly timed pause."
Mark Twain



"Now and then it's good to pause in our pursuit of happiness and just be happy. "
Guillaume Apollinaire