Class is going like normal as you and your classmates are focused. You all then suddenly hear the alarm go off and a frantic announcement comes through the speaker saying this

Announcer: We are now under lockdown. This is NOT a drill. If you're in the restroom, find the nearest class or office to go to. Again, we are under lockdown this is NOT a drill. An unknown, abnormal Anamoly has entered our school and is a danger to all. Teachers, lock your doors this instant. the alarms then shut off