The interviewer called me on it, and (verbatim) said “are you fucking with me?” I still haven’t met anyone else who got told to stop fucking around in an interview.
Which she can safely take as a sign that she should be very, very glad not to have "passed" that MS interview. It may or may not have been a very useful question to ask, but the interviewer's response indicates that he had clearly let the task assigned to him go to his head, and was basically on power trip, by that point.
The question that turned me into a babbling buffoon was “have you made any friends since moving to NYC?”
Also not an appropriate question to ask, and indicates a lack of respect for basic personal boundaries on the part of the interviewer.