I'll start us off. The first one is not quite dumb, but funny nonetheless. I applied to a retail banking (teller position) internship years ago to get some first-hand interviewing experience, knowing very well I didn't want to go into retail banking.
When the interview was over, I asked them how many students go into PE because I wanted to use this internship to springboard into that industry. They asked me what I meant by PE, so I said Private Equity. Then they asked some examples of PE companies and I listed off BX, Bain, and TPG. They still gave me an offer.
An actual dumb thing I said was at my first Private Equity interview at a search fund. Interviewer asked me why I wanted to go into Private Equity, and me being unpolished, I said that I had thought about IB and didn't want to work that many hours.
Interviewer responded with, "...You know Private Equity is right around the same work as IB, right?"
Lmao. You live and you learn.