I’m interviewing as well lately. I haven’t run into anything remotely like this, but I’ve ended several interviews early.

It’s totally okay to call it if you know you aren’t interested. In fact it’s more polite to save everyone’s time. I’d recommend opening up to the idea that the interview is yours as much as theirs, and you can leave any time you’d like. Just be very respectful about it.

What happened to you is bizarre. Many many years ago I had a slightly drunk guy interview me and tell me I wasn’t the right caliber for his team, haha. That was so weird. Maybe I should have gone in there totally hammered and I would have gotten the job.

Sometimes you just know it isn’t meant to be though and you’ve got to just call it.