One day, a blonde, a brunette, and a redhead were all driving in a car when the car crashed. Minutes later they appeared up in heaven. God says to them "Ahead are 100 stairs, at each stair you will be told a joke, if you laugh you will take the one way train to Hell, if you remain silent, you will continue on. If you make it to the top, you will stay in Heaven."
So the brunette started up the stairs. At the 55th stair she laughed, and was sent abroad the train to hell.
The redhead started to climb but laughed at the 79th stair and got on the train to Hell.
The blonde started up and made it to the 100th stair. She paused, then began laughing non stop. Shocked, God asked her why she had laughed. Still laughing she replied, "I finally got the first joke!"