Tom, Dick and Harry went to a party. After the party they returned to the hotel. The hotel was 300 stories high.
Unfortunately for them, the elevator was not working. They made a plan for the first 100 stories, Tom will crack jokes.
The second 100 stories Dick will tell a happy story and lastly Harry will tell a sad story. They then started up the steps.
After 2 hours it was Harry's turn. He turned to the other two and said "Ok guys, here's my sad story. I forgot the keys downstairs.