A passenger in a taxi tapped the driver on the shoulder to ask him a question. The driver screamed, lost control of the cab, and nearly hit a bus.
The shaking driver said, "I'm sorry but you scared the daylights out of me."
The poor frightened passenger apologized and said he hadn't realized a mere tap on the shoulder could frighten someone so much.
The driver replied, "No, no, it's my fault. Today is my first day driving a cab. I've been driving a hearse for the last 25 years."