The Queen and the Pope are on the same stage. Huge crowd. The Queen and His Holiness however, have seen it all before, so to make it a little more interesting, Her Majesty says to his Holiness, "Pope, did you know, that with just one little wave of my hand I can make every English person in this crowd go wild?" 

He doubts it, so she shows him, and sure enough the little royal gloved wave elicits rapture and cheering from every pommie in the crowd. Gradually it subsides. 

His Holiness, not wishing to be outdone by a woman, who incidentally is wearing a worse frock and hat than he is, thinks to himself, what am I to do. Then it dawns on him. "Your Majesty, that was impressive, but did you
know that with one nod of my head I can make every Australian in the crowd go crazy with joy? This joy will not be a momentary display like that of your subjects, but this joy will go deep to their hearts, and they will talk
of it and rejoice for months." 

The Queen seriously doubts this .. "One little nod of your head, and all the Australians are joyous for a week? Show me." 

So the Pope head butts her.