The one truly memorable one, which I’ve mentioned here before:
I got pulled in at the last minute to be one of the 2 or 3 interviewers to meet with a candate; protocol was they would be seen by one or two people at my level, then passed on to the project manager (partner; this was a Big 8 accounting firm). Someone else was supposed to do the first interview but was unavailable at the last minute, so I got roped in.
I apologized to the candidate for being behind and had him wait a minute or two while I read through his resume, then we got on with the usual interview questions.
He was a nervous wreck. He was almost literally shaking in his shoes. I didn’t especially notice whether he was perspiring heavily but it would not have surprised me. I’m a pretty un-perceptive person but even I could see he was a wreck. Monosyllabic answers, no sense of connection, no fluent conversation… it was almost as painful for me as it was for him.
It did not help that his last name happened to be that of a clueless character from a TV sitcom from my childhood - so I kept having to fight the urge to burst out giggling.
Somehow I managed to stretch the interview out to occupy 20 minutes (of our allotted 30), then took him over to the partner for the next stage.
She got rid of him within 10 minutes - then came over to me and said “What on EARTH did you DO to him???”. I threw my hands in the air and just laughed - as did the partner (who knew me to be not an especially terrifying person).