I had an interviewer at UCSD that really put the heat on me. All the other interviewees said theirs were really chill and relaxed. Luck of the draw I guess.
Dude was like: My last student had a 13, 14, 14 and a 3.9 from Cal, why should I accept you?
How would you feel being the only black student on campus and/or the city?
He asked a few other questions that were pretty difficult, some ethics stuff and a bit of politics, and he was a stern guy who didn't like to hear generic answers. At the end, he told me that he was thoroughly impressed though, so I think I handled myself well.