Class was interrupted because there was a crowd of people outside chanting that they had found “the code”. I walked out of the door to see each person holding up a card like you would see at the arrivals terminal of an airport. On each card was XX followed by a four-digit code (e.g. XX3336). Upon seeing the cards, I fell to the ground and went into a hysterical fit of laughter as I attempted to crawl out of the situation.