Won't say tanked but I went for an interview for a junior consulting position. At that point, I just had my diploma and a few years in a start-up, so no "corporate" experience. They asked questions you'd ask someone who's worked at a larger company, not an informal(ish) small business. Waffled my way through an answer, tried to dress it up with jargon - you know, "I had to adhere to customer relationship management principles where I had to balance the needs of the customer versus the needs of the business..." that kind of jazz. It was either that, or I say, "Did you even look at my CV? That kind of sh*t never happened there." lol...lesser of two evils, though. That was pretty much the same for every interview I'd went to afterwards, which eventually got me to a point where I'd just walk into interviews and fill time with words. The only one I got an offer for was one where all I had to do was fill in a questionnaire, which I aced. Got the job.
For the most recent one, I don't have any experience/qualification in that area (testing) but I'm a qualified dev, which they said was fine, they'd train me up to test. But the most classic part of that process is that they didn't even ask any of those, "What are your strengths/weaknesses" stuff, the dev manager just looked at my CV, said, oh, you've done this and this language - would you be interested in testing? I said, yes. We chatted mostly about programming, made a few nerdy jokes. They said they'd call back if I got through to the next round. Next round, met the CEO this time, she just said something along the lines, "I have no clue about your position, I'm just here because clearly they like you and I'm really here just to see if you can speak in full sentences and if you want to be here." Got the offer. Most pleasant process ever, neither side bullsh*t or put on airs and graces - maybe it's because I wasn't interviewed by HR but rather by the head of the dev team, but it definitely made up for the past experiences.