A taxi in town

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.