Old lady walking around the zoo comes to the elephant compound and finds it empty and the attendant crying. Whats wrong she enquires. Elephant has just died he cries. She tries to comfort him and says, you really loved him didn't you? No he replies, I've got to bury him!!

Bit further on she comes to the spiky animal compound and asks the attendant what the difference is between an echidna and a porcupine, the attendant replies the porcupine has a longer prick. Old lady is disgusted and goes to the head keeper and tells him what has happened.
He attempts to mollify her by saying that it was a poor choice of words on the attendants part and he should have said quill............because the prick was about the same size!!