maybe this is a good answer;
If your interview is going bad, I suggest you start asking the interviewer questions about how he came to work at the company. Find out where he started his career and what attracted him to his area of expertise. Basically, get the interviewer to talk about himself. People always like to talk about what they do for a living, the choices they made on getting there and what they like about their job. This strategy is an excellent opportunity for you to reposition yourself and look more favorably to the interviewer.