Thanks to Kevin I have this little golden nugget of a joke. Just be careful next time you change jobs, you may be surprised what comes up!
A friend was in a minicab when he leaned over and gently tapped the driver on the shoulder.
The cabbie screamed, lost control of the car, drove over the kerb and stopped inches from a large plate glass window.
The driver said "I'm so sorry but you scared me".
My shaken friend apologised.
The driver replied "It's entirely my fault. Today is my first day driving a cab -- for the previous 25 years I drove a hearse!"