I once went on the Uni milk round as an interviewer, still being on the right side of 30 at that time and 'somebody students could identify with' - we only covered about eight of the premium UK unis.....(now isn;t that arrogant but it was twenty+ years ago).
Anyway we were at Bristol, interviewing in twos, an HR (Human Remains) person being present. This very charming girl at the end of her interview and on the exit said to us "Good luck with the next candidate." Somewhat precocious.....
This chap comes in sits down and says nothing. My colleague asks an open question - about his course which was in Art History - no response really. I ask one about his research work, titled something like "A comparative study of the impact of art on the construction of pottery chimney stacks in Norwich and Bristol Delft factories and their mathematical linkage to 17thC philosophy."
Response, "You wouldn't be interested."
But we are and would like to hear a summary, "You wouldn't understand."
The interview continued like this until in frustration my colleague asked a q about the TA which was in his cv. This released the dam - blahed on and even dropped down prone behind a waste paper basket to demo how soldiers minimise their body against snipers.
Finally he pulled himself up onto the chair. "Well that is the end of the interview. I look forward to hearing from you on where Round 2 is." And he gets up, walks out, leaving us tow agog. We probably turned down a future CEO.