Sometimes you don’t think magic is all that powerful. You think you’ll only get one animate broom, if that. And then suddenly you have three million animate brooms and you are drowning in the waters of your own confusion and ignorance and feeling like Mickey Mouse in an animated short. 

(Amusingly, the old tale of The Sorcerer’s Apprentice was also recounted in Compendium Maleficarum. Witch hunting manuals have so much accidental wisdom in them.)