A joke of a wizard who can't even get his wand to act correctly accidentally stumbled upon a large and very dangerous dragon. This wizard was able to save the school that he taught at and to this day nobody knows that him saving the school was a lucky attempt.
My magic wand was acting strangely when it backfired and blew up the cup I was trying to change into a parrot. The cup split into hundreds of pieces and the room full of young wizarding students laughed hysterically. This type of mishap was not rare in my class, things like this happened all the time and not because of the students.