The smart kangaroo

A kangaroo kept getting out of his enclosure at the zoo.

Knowing that he could hop high, the zoo officials put up a ten-foot fence.

He was out the next morning, just roaming around the zoo. A twenty-foot fence was put up.

Again he got out. This continued for a few days, each time the fence became taller and taller.

When the fence was forty feet high, a camel in the next enclosure asked the kangaroo, "How high do you think they'll go?"

The kangaroo said, "As high as they can go, unless somebody locks the gate at night!"

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