Everyone knows the story of Harry Potter, the Boy Who Lived; the legend of Fred and George Weasley; the misadventures of the group known as the Marauders. Every generation has a student or two, or three... or four... or more.
No student would believe that one of the biggest troublemakers Hogwarts had ever seen was Minerva McGonagall. Nor would they probably believe that House Unity was never better exemplified, than with five friends: Minerva and Mary, both Gryffindors (though Mary was quite a Slytherin); Filius, a Ravenclaw; Pomona, a Hufflepuff; and Will, a Slytherin.
It's all bizarra's fault. True story.