i can allways remember years ago my aunty had this border collie it was the crazyist thing ever lol. and my family are all rangers fans, scotish football team... and i jst remember when u said celtic...rangers rivals...to the dog it used to bark and go crazy and run around the room and jump up and down...not in a aggressive way but...how would u even teach a dog such a mad trick..their was a few other words it used to go loopy at aswell cant remember them...was sooo funny but.