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

Knowing that he could hop high, the zoo officials put up a five metre fence.

Surprisingly, he was out the very next morning, happily jumping around the zoo.

A 10-metre fence was then put up, but again, he got out.

When the fence was 20 metres high, a camel in the next enclosure asked the kangaroo: How high do you think theyll go?

The kangaroo shrugged and said: Probably a hundred metres, unless somebody locks the gate at night.