 When Bart is talking to the boy 's father on the phone he says " I think I hear a <unk> eating your baby " , referencing the case of Azaria Chamberlain , a ten @-@ week @-@ old baby who was killed by <unk> . The <unk> taking over Australia and destroying all the crops is a reference to the cane <unk> , originally introduced to Australia in order to protect sugar <unk> from the cane beetle , but became a pest in the country . 
