We asked our Facebook followers to share memories of that defining moment in the club's history, revealing where and how they witnessed it.
Thanks to everyone who replied to our post; here's a selection of responses:
Jacinta Sanchez: In a bar in Barcelona with my mum, going mental after the first goal. Our travel company went bust, so whilst we got to Barcelona and home again, we were never given our tickets for the game. The atmosphere following the game, running through the streets of the city, was still amazing!
Joel Merrick: Lake District on a 6th form trip.