A taxi passenger tapped the driver on the shoulder to ask him a question. The driver scared, lost control of the car, nearly hit a bus.
For a second everything went quiet in the taxi, then the driver said, "Look man, don't ever do that again. You scared the daylights out of me!"
The passenger apologized and said, "I didn't mean 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 taxi driver - I've been driving a funeral van for the last 25 years."