What is the worst interviewing experience you have ever had?

Whether you're a hiring manager or a person being interviewed, what was your worst experience?

I'm a hiring manager for my company and during an interview with a potential candidate I was asking my standard spread of questions and one of them is "what do you believe is your greatest weakness?"

The candidate replied "You shouldn't ask people that. It is a really triggering question and you shouldn't be allowed to ask that. I'm feeling very uncomfortable and vulnerable right now"

I couldn't believe it, I just told him the interview was over and showed him the door.
What is the worst interviewing experience you have ever had?
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