Prospective employer - "How close to the edge of that cliff can you drive at speed?" / First candidate for chauffeurship - "Within two inches, easy." / P. E. - "And you?" / Second candidate - "I have driven within half an inch." / P. E. - "And you?" / Third candidate. - "Sure, I would keep as far away as I could, if it cost me the job.
Source: wiktionary