accidentally to Hogwarts...

You were a first-grader at a regular Muggle school. You were in class (a drama club taught by the famous British actor, Alan Rickman), and you were asked to go get a magazine. You got up and went to the hallway, and when you returned with the news that the magazine was missing, and that the older students had lost it somewhere, which their form teacher confirmed. But when you opened the door, it wasn't the drama club hall, but a Hogwarts room (the time of the Triwizard Tournament, when Harry was being judged, and just after the Sorting of the "three" wizards...)