Two prisoners were making their escape over the jailhou...

Two prisoners were making their escape over the jailhouse roof when one of them dislodged a tile. “Who’s there shouted a guard. The first prisoner replied with a convincing imitation of a cat’s meow. Reassured, the guard when back to his rounds But then the second prisoner dislodged another tile. The guard repeated, “Who’s there?” “The other cat,” answered the prisoner.