VIDEO : J.K. Rowling Decided to Call in the Twitter Hordes to Support the Scottish Rugby Team

Harry Potter author J.K. Rowling knows she has a highly passionate fan base that she can use for good or evil ? depending on where your loyalties lie in the 2015 Rugby World Cup.

On Saturday, her beloved Scottish rugby team was to square off against Samoa, and Rowling decided to call in the Twitter hordes for their support. The quid quo pro? A choice piece of Harry Potter trivia in the form of Sirius Black's birthday. Needless to say, Potter fans were into it ? especially those whose countries had nothing to lose in the World Cup.Others felt themselves severely tested ? would patriotism or Potter win the day? In the end, fans were duly rewarded with Black's birthday when Scotland emerged victorious.