Mars, Tony I'm in a really tricky and sort of an embarrassing situation. Took the McKinsey PST recently after having been approached by the recruiter for an experienced hire position directly. The telephonic chat had gone really well and I was really looking forward to getting on with the rest of the selection process.So, here's the deal: candidates were led to a small meeting room where the test was administered. The guy opposite me was rather strange as in he kept sighing really loudly as soon as the test commenced (and it was just a few of us in the room with me being the closest to him) and was talking to himself every now and then mumbling/cursing himself for some random calculation error, animatedly tapping his pen, feet, more loud sighs, shuffling around etc.It may sound like I am making allowances here but even a few minutes into the test I knew it would be extremely difficult for me to concentrate on what were already quite a lengthy calculation based set of problems in a time pressured scenario (without a calculator!) and with this outrageously distracting person the task was rendered impossible. I, as well as the person next to me did give this guy a couple of lingering glares but to no result. I was so frustrated I just had to guess a number of questions and obviously knew it was all over there.I know I had options: could have called the test administrator and said, "a fellow candidate is being distracting?" I just couldn't especially when the rest didn't seem majorly inconvenienced. I could have said something to the guy but who does that? I obviously wasn't successful on the PST but my question is this: should I say something to the recruiter? Or just dismiss the failure at my dream of a McK position as a stroke of bad luck and due to what many would argue an inexplicably low tolerance of noise (to be fair to me I've never been in an exam situation in such cosy surroundings!). Should I ask for another chance? I wish I could just blame the obnoxiously loud candidate but I guess I know deep down only I am responsible. I need to either invest in some ear plugs if I am going to sit another exam or demand a separate room or just forget strategy consulting because there'll always be assessments in less than ideal situations.Apologies for the length of this. You have no idea how crushing this is.