A PASSENGER IN A TAXI

A passenger in a taxi leaned over to ask the driver a question and tapped

 him on the shoulder. The driver screamed, lost control of the cab, nearly 

hit a bus, drove up over the curb, and stopped just inches from a large plate

 glass window.

For a few moments everything was silent in the cab, and then the still shaking

 driver said, "I'm sorry but you scared the daylights out of me."

The frightened passenger apologized to the driver and said he didn't realize 

a mere tap on the shoulder could frighten him so much.

The driver replied, "No, no, I'm sorry, it's entirely my fault. Today is my first

 day driving a cab. I've been driving a hearse for the last 25 years."