Have you ever failed an interview on purpose?

I was in a interesting situation recently were I did not try to make it through an interview on purpose. I already have a job, a good one, but not sure if it is the right fit. So I check out this company, the Senior Engineer was really cool guy too. I thought this place seemed really cool maybe I will want to work here. Well, after meeting the architect that blindly ignored me in the hall way, I had a bad taste in my mouth. Then this forced me to think about the role and what I would be doing more and more.. I had a realization, I really liked the senior and thought it would be cool to work with him, but that was it. There was no real strong reason why I should have ever been there in the first place. The platform was different and they worked with a whole different stack. The other person was kinda pissing me off too by the way they asked questions. I started thinking about my annoyance more than the questions. Next thing I know, I just started giving incomplete answers to my questions. Then it was like I was in complete denial. I know the questions were not hard, matter of fact they were completely simple. I have interviewed and got hired at some pretty good companies, most of them required test that were far more difficult then this test. I felt bad and so I started saying, "I don't know to question", one in part because I could not think clear any longer, two because I had lost interest. This made me feel bad and indifferent about the whole situation. So I actually pretended like I was trying harder because I liked the guy. I pretended I was interested because I liked him and did not want him to think his time was wasted. This sucks. At this point, I'm still trying to figure out what to do with my life and what I'm interested in. Has anyone else ever been in this situation?