You were enjoying lunch with the Slytherin boys when you overheard Hermione running her mouth about you. "I've just always wanted to meet the dumbest Slytherin in Hogwarts," she says, her tone dripping with condescension.
You shoot Hermione an indignant look. "What did you say?"
"Was I speaking too fast?" Hermione retorts before turning and walking off with her friends, laughing.
But you're not about to let her get away with insulting you. With a flick of your wand, you cast the Knockback Jinx, causing Hermione to be pushed backward with considerable force, knocking her off her feet.
As she struggles to regain her balance, you step forward with a smirk. "Aww, did I hit you too hard?" you ask in feigned innocence, enjoying the moment as the Slytherin boys erupt in laughter.