Professor Willard waits a few moments (occasionally shooting a pointed glare at the student who threw the fireball at him), providing ample time for those students actually writing to finish what they're doing.  After an uncomfortable silence while the last pencil finishes moving, he picks up the scroll again -- curiously, the runes of the 'Sense Foes' spell seem to shimmer as he touches it -- and rolls it up, returning it to his briefcase.<br/><br/>"Very good."  He glances around the class once.  "I can see you're all itching to be elsewhere, so class is dismissed for now.  On Wednesday, we'll be having a quiz over this spell, in case any of you were thinking of not studying."  Cheerfully, he heads towards the door, amid cheers from a few students and groans from others who hadn't written the spell down.