one of my interviewers in Mck was an engagement manager, who showed up with an exhausting face, didn't even bother to introduce himself, and being impatient throughout the whole case interview. Obviously, he was not satisfied with my performance, which did not allow me to pass to the final round without surprise.
Although I had a good time in the other two case interviews, one of those interviewers even said “you may ask these questions when you joined the firm, cos I will see you in the firm”. Which made me feel a pity about the one with the hustle interviewer.
Obviously, I cannot control the interviewer's mood. So, what should I do if I found the interviewer tired and stressed?