While he waited for the great flood to begin, Noah had to house the various animals. He built a special eight foot high fenced enclosure for the two kangaroos, but during the first night in the fence, they escaped. Noah found them hopping around outside the following morning. So he increased the height to 15 feet, but the kangaroos escaped again.
Exasperated, he added another 15 feet to the enclosure. The kangaroos still escaped. After Noah put the 'roos back inside the fence, they were approached by one of the giraffes. "How high do you think Noah will build the fence this time?" the giraffe asked.
"I don't know," answered the female kangaroo. "But he might eventually get it to 1,000 feet if he keeps leaving the gate unlocked!"