BRAIN TEASER
A man is leaving on a business trip and stops by his office on the way to the airport. The night watch-man stops him and says, "sir, don't take that flight, I had a dream last night that your plane crash and everyone would die.
The business man cancel the trip and sure enough, the plane crashes, killing all the passengers. The man gives his watch-man $10, 000 reward for saving his life and sacked him immediately.
WHY?

because he obviously slept on the job.

As a night watchman he is supposed to be awake all night not sleeping and dreaming.