A vicious dog, salivating and with fangs bared, bites through its lead and gets loose in a Liverpool park. To everybody's horror, it starts running menacingly right at a little old lady, its intent abundantly clear.
At the very last moment, a young man comes sprinting over from nowhere and manages to boot the bloodthirsty dog across the grass and away from the woman, saving her life.
A reporter from the local paper happens to be walking nearby and he hears the commotion and rushes over to congratulate the man and grab the scoop, his notebook out ready.
"Wow!" he says, "I've got the headline now: 'Heroic LFC fan saves senior citizen's life in attack by frenzied dangerous dog!'"
The man says "Thanks, but I'm not actually a Liverpool fan".
"No problem at all, then," says the journo, "the headline will be 'Pensioner rescued from certain death by amazingly brave Everton fan in killer beast onslaught!'"
The man says "It's very kind of you, but I actually support Manchester United."
The presses roll overnight and the local paper is published, with its front-page scoop proudly displayed in huge letters: 'Evil heartless Manc bastard brutally murders much-loved family pet'.