FA Cup

The Community Shield (formerly the Charity Shield) is the English season curtain-raiser that is played between the winners of the Premier League and the FA Cup the previous season. If a team wins the double of both Premier League and FA Cup, the other team in the Community Shield will be the runners-up from the Premier League. It is traditionally played at Wembley Stadium, although in some seasons the game has been played in Cardiff and Leicester. The fixture exists in other countries as a Super Cup of some sort, and also in European competition as the European Super Cup (a match between the Champions League winners and the Europa League winners).

When a lower league or underdog team knocks out a much bigger club, usually in a cup competition, particularly synonymous with the FA Cup. The smaller team has nothing to lose, give absolutely everything for 90 minutes, and the favourites often look like they can't be bothered. Home advantage at a tight, hostile ground helps too.