Interviewer talked up his "client" and said what a great fit he thought I was for the company based on my resume. Then he asked my salary expectations, and I gave a number slightly higher than my actual target (because why undersell myself?).
Rather than come back with a counter figure like any reasonable person, he instead decides to berate me and talk down my experience, and prod me to give him a lower figure rather than just state a range himself. That was the end of our conversation.
This is the most unprofessional recruiter I've had the displeasure of speaking to, and that is a pretty low bar already.