The interviewer was in a very loud room and I couldn't even hear him. The interviewer was young and ambitious but very rude. He never gave me the chance to finish a sentence, often interrupted and apparently irritated by my answers. Eventually, I was asked to answer some corner cases questions about bayesian classifier on which, of course, I failed. I never remember all the formulas and all the mathematical corner cases, unless it's something important!
From another point of view, I am glad I didn't end up with that group. Can't tolerate for too long someone who's always interrupting and disrespectful.