Harry: I'm telling you, Malfoy, you must have messed it up.
Draco: Impossible! Even Granger couldn't reach my level of accuracy with potions!
Harry: *Shrugs and looks around the classroom* Well, everyone else got their love potions to work, and I don't feel any different. You must be off your game.
Snape: *Overhears*
Snape: *Sighs and pinches the top of his nose*