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 shop window. 

For a second everything went quiet in the cab, 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 realise
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."