When he or she exclaims: "Why should I take you on rather than that tramp in the street?" you can be sure that you are up against a poor interviewer who probably had a troubled childhood.

Fortunately, few people go in for this approach anymore. Any who do are usually line managers who have limited interview experience save with a few qualified staff from personnel. Stay calm, answer the content of the question rather than the emotion behind it and avoid getting angry back.