Many football fans make bold claims about their football teams, stating that they will do some random forfeit if their team actually succeeds in the unthinkable.
When Leicester City were topping the Premier League in 2015-16, former Foxes forward Gary Lineker tweeted that if they won the title, he would present Match of the Day in his underpants.
True to his word, the ex-England striker did exactly that, wearing only a pair of Leicester shorts as he introduced the first episode of the highlights show for the 2016-17 season.
On Twitter, some fans talk about similar exploits in order to get attention, knowing there is no way South Korea will win the World Cup, ensuring they gain extra followers but do not have to seek out edible hats.