A group of students tricked millions of people with their viral video. It was part of a college assignment at Missouri State University. A student posted a video claiming her professor had thrown a party instead of having an exam, but that no one turned up. It showed a handful of pupils sitting in an empty classroom while the teacher looked upset at the front of the class. The video has been viewed almost 7.8 million times, with 71,000 retweets and 343,000 likes.