Blond on Stairs to 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 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 blond 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!"