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 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…….u can imagine what went into my mind when u touched my back!!