Jokes in Heaven

One day, a blond, a brunette, and a redhead were all driving in a car when the car crashed. Minutes later they appeared up at the Pearly Gates. St. Peter met them and said, “We are doing something different today. Ahead are 100 stairs, after each 10 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.”
The brunette started up the stairs. At the 50th stair she laughed, and was sent abroad the train to hell.
The redhead started to climb but laughed at the 80th stair and got on the train to Hell.
The blond started up and made it to the 99th stair. She paused, then began laughing non stop.
Shocked, St. Peter asked her why she had laughed when she almost made it. Still laughing she replied, “I just got the first joke!”