The boss of a company was last out of the building and on his way to his car. On his way to the train station he saw the Night watchman, they waved and said goodnight to each other. Just before the boss went into the station ,the night watchman ran over to the boss and told him "I had a dream last night that the 7:15pm train is going to crash and there will be NO survivers , so can you please not take it". the boss agreed to this and took the bus.

When the boss got home, he stuck on the TV and turned to the news channel where it had a report on the 7:15pm train crashing and there where NO survivers.

The next morning the boss went to the night watchman gave him $500,000 for saving his life and then sacked him! Why did he sack him?

Answer: because the night watchman said that "he had a dream last night" meaning he was sleeping on the job.