For thirty years, Johnson had arrived at work at 9 a.m. on the dot. He had never missed a day and was never late. So when 9 a.m. passed one day without Johnson's arrival, it caused a sensation. All work ceased, and the boss himself, looking at his watch and muttering, came out into the corridor. Finally, precisely at 10 a.m., Johnson showed up, clothes dusty and torn, his face scratched and bruised, his glasses bent. He limped painfully to the time clock, punched in and explained "I tripped and rolled down two flights of stairs in the subway. Nearly killed myself." The boss responded, "And rolling down two flights of stairs took you a whole hour?"