I remember this from a newspaper article about a seminar on lawyer courtroom tactics (I think that was the subject). The speaker was hammering on the issue of making your point then stopping. He described a case in which a man was accused of biting another man's nose off during a fight. The star prosecution witness was being cross-examined by the defendant's attorney. ATTY: Did you see the defendant bite off the victim's nose? WITNESS: No ATTY: Then how do you know he bit off the victim's nose? WITNESS: I saw him spit it out.
(From the "Rest" of RHF)