Impact of job change

This forwarded joke found itself in my inbox recently. I really found it funny:

A taxi passenger tapped the driver on the shoulder to ask him a question.

The driver screamed, lost control of the car, nearly hit a bus, went up on the footpath, and stopped centimeters from a shopwindow.

For a second everything went quiet in the cab, and then the driver said: "Look mate, don't ever do that again. You scared the daylights out of me!".

The passenger apologized and said, "I didn't realize that a little tap would scare you so much."

The driver replied, "Sorry, it's not really your fault. Today is my first day as a cab driver - I've been driving a van carrying dead bodies for the last 25 years."