Zoo officials decided that raising the height of the fence from 10 to 15ft would be enough to keep the Kangaroo in, but to their dismay the morning after the fence had been raised the kangaroo was found hopping round the public areas.
The officials raised the fence by another 5ft. Once again the Kangaroo proved to be an escape artist.
Again the fence was raised ..... and continued to be for another week ..... every time the Kangaroo managed to escape.
After another week of fence raising and continued escapes the Camel in the next enclosure asked the Kangaroo how high they would have to go to stop him escaping, to which the Kangaroo replied......
As high as they like ....... but someone needs to remember to lock the gate ;D

